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 . A: Did you hear that three people died in a fire last night?
B: What a terrible         ! How did it happen?

A．accident

B．incident

C．occasion

3 . A: Have you treated any real emergencies in your first-aid course at the Red Cross?
B: Well, they let us ride along with some paramedics. Once, we gave first aid to a          of a traffic accident before rushing him to the hospital.

A．victim

B．patient

C．sufferer

4 . A: Can I see you for a moment?
B: Is it a matter of           ?

A．urgency

B．emergency

C．seriousness

5 . A: The price for this car? Fifteen thousand dollars out the door! What a deal!
B: Well, if the car hadn’t been in an accident, that would be a good price, but it has a few ________ problems.
(Which option is not suitable?)

A．slight

B．minor

C．tiny

6 . —It’s ________ your promise to be absent from Helen’s party.
—Yes. But I have to prepare for my report next week.

A．for

B．against

C．with

D．from

7 . 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

8 . There is no ______ that practice makes perfect, so don’t be afraid of ______ while you are learning to speak English.

A．question, laughing	B．question, being laughed
C．questioning, being laughed at	D．questioning, being laughed

9 . He found______ important to learn the history of our country.

A．that

B．it

C．this

D．what

10 . Either you or he ________ a shower first.

A．take

B．taking

C．to take

D．takes