They often go to the restaurants for meals. They _____ be very poor.
| A．mustn’t | B．can’t |
| C．may not | D．needn’t |
He got well-prepared for the job interview, for he couldn’t risk the good opportunity________.
| A．losing | B．being lost | C．to be losing | D．lost |
Only teachers are permitted to enter the reading room, that is to say, the reading room is only________ to teachers.
| A．abundant | B．aware | C．accessible | D．absurd |
I’m as busy as a bee; ________ you bother me with so many questions now?
| A．can | B．shall | C．must | D．may |
Some Southeast Asian countries were quick to ________ the search for a missing Malaysian airliner--Malaysia Airlines Flight 370.
| A．join | B．participate | C．attend | D．involve |
—Hi, Tommy. Are you busy now?
—________. I have done my work, and I’m going out for shopping.
| A．Don’t mention it. | B．Nothing serious. |
| C．Never mind | D．Not really. |