Realising how important his job was, he began to ________ it seriously.

A. conduct 　　　　 B. take 　　　　　　 C. perform 　　　　 D. absorb

You really need to go out and get some fresh air and sunshine．You ______ overworked during the last two weeks．

A．have been　 　 B．were　　 　　 C．had been　 D．would be

How ________you say that you really understand the whole story if you have covered only part of the article?
A．can B．must C．need D．may

As the famous comedian went on stage, the audience h ______ with laughter.

For breakfast he only drinks juice from fresh fruit 　　　 on his own farm. (2009北京）

A. grown　　　 　　　　　 B. being grown C. to be grown　 D. to grow

Don’t be too ______ about what you eat, or you are likely to develop an unbalanced diet, which is harmful to your health.

A. special　 B. particular　 C . concerned　 D. worried

We must ________ the act of cheating ________ a fair competition system.

A．prevent; creating 　　 B．stop; to create

C．keep; from creating D．stop; creating

　　　 fire，all exits must be kept clear.?

A.In place of 　　　　　 B.Instead of?　　　　　 C.In case of　　　　 D.In spite of

Three　 of　　 students are needed to plant trees this afternoon.

A、hundred;the　　　 B、hundreds;the　　 C、hundred;/　　　 D、hundred;these

Now that Tom hates_______ school, the school becomes_______ prison to him

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