We have various summer camps for your holidays； you can choose __________ based on your own interests.
| A．either |
| B．each |
| C．one |
| D．it |
His parents meant him_____________ scientific research, but he showed no interest and turned poet.
| A．going in for | B．to have gone in for |
| C．to go in for | D．having gone in for |
—Why didn't you answer my phone when I phoned you at about 11 p. m. yesterday?
—I ___________and failed to hear the phone.
| A．might have slept | B．must be sleeping |
| C．might be sleeping | D．must have been sleeping |
. —____________ you_________ the editor at the airport?
—No, he__________ away before my arrival.
| A．Have... met; has driven | B．Had... met; was driven |
| C．Did... meet; had been driven | D．Have... met; had driven |
Exercise is__________ as any other to lose unwanted weight.
| A．so useful a way | B．as a useful way |
| C．as useful a way | D．such a useful way |
—What do you think of your nephew?
—He__________ be very naughty but at the same time you poor.
| A．will ; will | B．won't; can't |
| C．may ; may | D．can; can't |