. ------ The door was open.

----- It ___________open. I had locked it myself and the key was in my pocket.

       A. can’t be      B. mustn’t be       C. can’t have been       D. mustn’t have been

-------How did you find your missing pen?

  -------___________

A. I found it in my bag        B. Quite by accident.

C. It wrote well              D. I had no idea where it was.

. A clean environment can help the city bid for the Olympics, ________ in turn will promote its economic development.

A. what          B. which            C. that          D. as

第二节：完形填空 (共15小题；每小题1分，满分15分)

阅读下面短文，掌握其大意，然后从31-45各题所给的四个选项(A、B、C和D)中，选

出最佳选项。

Many TV programs seem to be quite realistic (真实的). One   41   watches TV often feels that whatever happened in the film may as well happen   42   him. With only a little thinking, every man in the street may   43   to be a thief, or a spy (间谍), or a murderer. Jane had been watching a spy film at a friend’s home. In it a young girl had been   44   and killed. She felt a little frightened. She took a   45   back to the center of the city. There were a lot of people traveling with her, so she felt much   46  .

A man sat face to face with her,   47   a newspaper. She thought nothing of it  48 _ she saw him looking at her for a long time. Remembering the film and feeling   49  , she got off the train and went to the bus stop. When she got on the bus, she found he was following her. When she got off the bus, she was getting more and more nervous as there was   50   else in the street. She walked as quickly as she could. She could hear footsteps behind her, but she didn’t dare to look   51   her shoulder (肩膀). It seemed to have been hours   52   she reached the front door. She felt for her keys, but couldn’t find them. The   53   stopped behind her. She felt a hand on her shoulder. Instead of feeling hands round her neck, she heard a pleasant  54 : “ I am sorry   55   I frightened you. I thought I recognized you in the train, but I was not sure.”

41. A. he           B. which                  C. who                 D. she

42. A. to            B. on                    C. upon                D. in

43. A. look           B. appear                 C. turn                 D. come

44. A. watched      B. followed              C. searched              D. hurt

45. A. bus                 B. car                   C. train                 D. plane

46. A. safe            B. more worried          C. dangerous            D. safer

47. A. reading       B. looking                C. seeing                 D. watching

48. A. when          B. after                        C. as                    D. until

49. A. frightened      B.puzzled               C. excited                D. surprised

50. A. someone        B. no one                 C. anyone                D. none

51. A. on           B. for                   C. at                     D. over

52. A. before        B. when                   C. as                    D. until

53. A. thief           B. footsteps              C. spy                  D. murderer

54. A. sound         B. noise                  C. voice               D. word

55. A. whether             B. as if                    C. even if                D. if

—I found my mom not feeling well this morning. I’m afraid she is ill.

— _________.

A. Don’t worry too much              B. It’s nothing at all 

C. I’m sorry to hear that                D. Take it easy

 The results of the examination ________ that you have all made great progress.

       A. shows               B. show                        C. showed             D. has shown

.—I wonder how much you charge for your services.

—The first two are free, _______the third costs ＄30.

A.    while      B.    until C.    when       D.    before

Sometimes a __ man is afraid of __.

A. dying, death   B. died,dead   C. died, death   D. dying, dead

Will you give me __ blue ink?

A. any   B. some  C. little   D. few

Science Daily (Apr 27, 2008) — Dutch ecologist Roxina Soler and her colleagues have discovered that subterranean (地下的) and aboveground herbivorous (食草的) insects can communicate with each other by using plants as telephones. Subterranean insects issue chemical warning signals through the leaves of the plant. This way, aboveground insects are warned that the plant is already “occupied”.

Aboveground, leaf-eating insects prefer plants that have not yet been occupied by subterranean root-eating insects. Subterranean insects send out chemical signals through the leaves of the plant, which warn the aboveground insects about their presence. This messaging makes it possible for spatially-separated insects to avoid each other, so that they do not compete for the same plant.

In recent years it has been discovered that different types of aboveground insects develop slowly if they feed on plants that also have subterranean residents and vice versa (反之亦然). It seems that a system has developed through natural selection, which helps the subterranean and aboveground insects to notice each other. This avoids unnecessary competition.

Through the “green telephone lines”, subterranean insects can also communicate with a third party, namely the natural enemy of caterpillars (毛虫). Parasitic wasps (寄生的黄蜂) lay their eggs inside aboveground insects. The wasps also benefit from the signals sent by the leaves, as these help them find more insects for their eggs.

The communication between subterranean and aboveground insects has only been studied in a few cases. It is still not clear how widespread this phenomenon is. But scientists are looking into it. This research was carried out at the Netherlands Institute for Ecology (NIOO-KNAW) by Roxina Soler, Jeffrey Harvey, Martijn Bezemer, Wim van der Putten and Louise Vet. The PhD project, in which this study was carried out, was funded by the Free Competition of NWO Earth and Life Sciences.

51. After finding a plant occupied by subterranean insects, aboveground insects usually ____.

A. send out warning signals             B. choose to give up the plant

C. compete for the plant                D. share it with the subterranean insects

52. Aboveground insects will develop more quickly if they ____.

A. feed on plants occupied by subterranean insects

B. feed on plants not occupied by subterranean insects

C. become cleverer through natural selection

D. compete with subterranean insects

53. Subterranean insects communicate with a third party through ____.

A. caterpillars     B. parasitic wasps    C. wasps’ eggs     D. a plant’s leaves

54. What can be inferred from the last paragraph?

A. Other animals may communicate in the same way.

B. There will be further research into this phenomenon.

C. Part of the study is a PhD project.

D. The Free Completion of NWO Earth and Life Sciences has the patent for these results.

55. What would be the best title for this passage?

A. Insects use plants as a telephone.         B. Insects live in harmony with each other.

C. No species can live alone.               D. Plants and animals have an effect on each other.