1 . Black holes________not be seen directly so determining the number of them is a tough task.

A．can

B．should

C．must

D．need

2 . The committee has approved his ______ that he put off his gap year till he finishes the research.

A．application

B．wisdom

C．arrangement

D．request

3 . If you ________ for another ten minutes, Mr Brown will be here.

A．wait

B．going to wait

C．about to wait

D．waiting

4 . I must check my bank balance to find out how much money I have in my credit card.

A．保持平衡

B．余额

C．平衡

5 . Then she made a ________ for further help.

A．decision

B．request

C．recommendation

D．order

6 . I had needed someone else to show me what I appreciated in my dad. It wasn’t the fact that he’d won; it was more than that. I began to________ that we have many of the same values and sometimes the same opinions. No matter how much I had tried to resist him, he still influenced me.

A．recognize

B．demand

C．argue

D．estimate

7 . The officers hit the watch, which cost nearly $100,000, into pieces on hearing Glen’s words. Glen was________. Before he understood why, he was taken to the office to be examined strictly.

A．disappointed

B．delighted

C．satisfied

D．amazed

8 . Now I can admit that I am__________ to the Internet. I spend hours of my free time online.

A．accustomed

B．contributed

C．addicted

D．devoted

9 . He has recently made a significant discovery — loneliness is a serious social problem that can contribute to depression and even crimes, but it can be prevented in a clever way. The__________? Chat benches.

A．solution

B．puzzle

C．excuse

D．intention

10 . Around her 6th birthday, Jessica lost sight, which followed the loss of sensation in her left arm. However, doctors had no answer. The whole family were heartbroken and__________, at a point of no return.

A．guilty

B．annoyed

C．confused

D．innocent