Do you have any difficulty ________?
| A．on listening | B．to listening |
| C．for listening | D．in listening |
Now researchers say that middle age________be the most fruitful time of life, full of new growth and development.
| A．must |
| B．should |
| C．will |
| D．can |
When asked by the police, he said that he remembered________at the party, but not________.
| A．to arrive; leaving |
| B．to arrive; to leave |
| C．arriving; leaving |
| D．arriving; to leave |
________all over the hills and around the lake are wild flowers of different kinds.
| A．To grow |
| B．Growing |
| C．Grown |
| D．Grow |
As I will be away for at least a year, I'd appreciate________from you now and then________me how everyone is getting along.
| A．hearing; tell |
| B．to hear; tell |
| C．hearing; telling |
| D．to hear; to tell |
When Mr. Brown got off the train, he found himself________by his students.
| A．surround |
| B．to surround |
| C．surrounding |
| D．surrounded |