--- Would you like to _____ Professor Smith’s lecture this Sunday?
--- Sorry, I have an important meeting to _______.
| A．attend; join | B．join; attend | C．attend; attend | D．join; take part in |
I can’t see my old grandmother ____ alone in the country, so I’ll have her ____ with me in the city.
| A．left; stay | B．leave; staying |
| C．leaving; to stay | D．left; stayed |
________ by the problem that was put forward at the meeting, the people in the audience had ________ looks on their faces.
| A．Puzzled; puzzling | B．Puzzled; puzzled |
| C．Puzzling; puzzling | D．Puzzling; puzzled |
I ______ asleep because it took me a long time to realize that the telephone was ringing.
| A．could have fallen | B．should have fallen |
| C．must have fallen | D．mustn’t have fallen |
When she realized I _________ her, she quickly made a pose, smiling.
| A．was photographing | B．photographed |
| C．had photographed | D．will photograph |
Only when your identity has been checked _________.
| A．you are allowed in | B．you will be allowed in |
| C．will you allow in | D．will you be allowed in |