As it tuned out to be a small house party, we ____ so formally.

A. needn’t dress up       B. couldn’t have dressed up

C. didn’t need dress up       D. needn’t have dressed up

Children in school are ______into different levels of grades，according to how much they

know.

A. combined        B. classified           C. listed         D. clarified

Unfortunately the restaurant he recommended fell far short of our _______.

  A. expectations   B. advantages    C.opportunities     D. contributions

There are many sports lovers in his office.Some love climbing, ___ others enjoy fishing.

        A. or      B. for       C. while      D.so

It looks ___ it is going to rain.

        A. like        B.as         C.as if          D.even if  

---How do you like DaLian, Jane?

   ---It’s a most beautiful city. I have______it for my holiday this year.

   A.depended on   B. carried on    C. decided on    D. taken on

A rainforest is an area covered by tall trees with the total high rainfall spreading quite equally through the year and the temperature rarely dipping below l6℃．Rainforests have a great effect on the world environment because they can take in heat from the sun and adjust the climate．Without the forest cover，these areas would reflect more heat into the atmosphere，warming the rest of the world. Losing the rainforests may also influence wind and rainfall patterns，potentially causing certain natural disasters all over the world．

    In the past hundred years，humans have begun destroying rainforests in search of three major resources(资源): land for crops，wood for paper and other products，land for raising farm animals．This action affects the environment as a whole．For example，a lot of carbon dioxide(二氧化碳) in the air comes from burning the rainforests．People obviously have a need for the resources we gain from cutting trees but we will suffer much more than we will benefit.

    There are two main reasons for this．Firstly，when people cut down trees，generally they can only use the land for a year or two．Secondly，cutting large sections of rainforests may provide a good supply of wood right now，but in the long run it actually reduces the world’s wood supply．

    Rainforests are often called the world’s drug store．More than 25％ of the medicines we use today come from plants in rainforests．However，fewer than l％of rainforest plants have been examined for their medical value．It is extremely likely that our best chance to cure diseases lies somewhere in the world’s shrinking rainforests．

Rainforests can help to adjust the climate because they                ．

  A．reflect more heat into the atmosphere

  B．bring about high rainfall throughout the world

  C．rarely cause the temperature to drop lower than l6℃

  D．reduce the effect of heat from the sun on the earth

What does the word “this” underlined in the third paragraph refer to? 

  A．We will lose much more than we can gain．

  B．Humans have begun destroying rainforests．

  C．People have a strong desire for resources．

  D．Much carbon dioxide comes from burning rainforests．

It can be inferred from the text that      . 

  A．we can get enough resources without rainforests

  B．there is great medicine potential in rainforests

  C．we will grow fewer kinds of crops in the gained land

  D．the level of annual rainfall affects wind patterns

What might be the best title for the text? 

   A．How to Save Rainforests                B．How to Protect Nature

   C．Rainforests and the Environment        D．Rainforests and Medical Development

Some refugees made______ new life for themselves across the border, but they were troubled with homesickness in _____later life.

   A. a; 不填     B. the; the     C. a; the     D. 不填; 不填

Bill suggested _____ a meeting on what to do for the Shanghai Expo during the vacation.

A. having held     B. to hold           C. holding         D. hold

Washing machines made by China have won ______worldwide attention and Haier has become _____popular name.

A. a; the        B./;a    C./;the        D. the; a