I _________ you, but I was busy all the time yesterday afternoon.
| A．could help | B．had helped | C．helped | D．could have helped |
________ in the queue for half an hour, Tom suddenly realized that he had left his wallet at home.
| A．To wait |
| B．Have waited |
| C．Having waited |
| D．To have waited |
---What do you mean ________ saying‘The boy is overgrowing’ ?
---I mean that he is tall ________ his age. (2013 .河北五校联盟调研)
| A．about; with |
| B．as to; for |
| C．by; for |
| D．by; to |
Few people have ever ________deep into this well, for it is extremely dangerous.
| A．risked going |
| B．tried to go |
| C．trys going |
| D．risked to go |
Most people didn’t accept the theory when it was first ________.
A. set about
B. set off
C. put forward
Gun control is a subject ________ Americans have argued for a long time. (2009 .陕西)
| A．of which |
| B．with which |
| C．about which |
| D．into which |