Mark went through the papers once more carefully for fear that he ____any essential details.
| A．dropped | B．overlooked | C．ignored | D．displayed |
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 |
Don’t just sit there ________ your legs; come and help me carry the box upstairs.
| A．swung | B．to swing |
| C．swinging | D．and swinging |
_____ to sunlight for too much time will do harm to one’s skin.
| A．Exposed | B．Being exposed |
| C．Having exposed | D．Exposing |