13.　　 We had to be patient because it 　　　　　some time　　　 　we got the full results.

A. has been; since　　　 B. had been; until　　　　　 C. was; after　　　　　　　　 D. would be; before

12.　　 Evidence obtained from observation and experiment is often used to　　　 　a scientific theory.

A. confirm　　　　　　　　 B. claim　　　　　　　　　　　 C. conclude　　　　　　　　　 D. calculate

11.　　 The survey　　　 　in our school last month shows that about 2 percent of the students are addicted to Internet games.

A. conducted　　　　　　 B. having been conducted　 C. conducting　　　　 D. to be conducted

10.　　 --Did you see who the driver was?

--No, so quickly　　　 　that I couldn’t get a good look at his face.

A. does the car speed by　　　　　　　　　　　　　　　　 B. the car sped by

C. did the car speed by　　　　　　　　　　　　　　　　　 D. the car speeds by

9.　　　　 The exercises are extremely difficult, but half of the class　　　 　them ahead of time.

A. has already finished　 　　　　　　　　　　　　　　　 B. will finish

　C. have already finished　 　　　　　　　　　　　　　 D. finishes高☆考♂资♀源?网　　 ☆

8.　　　　 　　　　　the Internet is bridging the distance between people, it may also break some families or cause other family problems.

A. When　　　　　　　　　 B. If　　　　　　　　　　　　　　 C. While　　　　　　　　　　　 D. Since

7.　　　　 --Why do you look sad?

--There are so many problems　　　 　.

A. remaining to settle　　 　　　 　　　　　　　 B. remained settling高☆考♂资♀源?网　　 ☆

C. remaining to be settled　　　　　　　　　　　　　　　 D. remained to be settled

6.　　　　 With the words, he　　　 　a wide-mouth jar from his pocket and set it on the table in front of him.

A. pulled out　　　　　　 B. checked out　　　　　　　 C. stuck out　　　　　　　　　 D. dropped out

5.　　　　 　　　　　,the idea of having to work under a woman defeated him.

A. Wanting the job very much　　　　　　　　　　　 B. Although wanting the job badly

C. Though he wanted the job very much　　　　 D. He wanted the job badly

4.　　　　 --James didn’t turn up last night, did he?

--No. He　　　 　.We had changed our plan.

A.shouldn’t have come　　　　　　　　　　　　　　　　　 B. needn’t have come

C. didn' t need to come　　　　　　　　　　　　　　　　　 D. needn't come