第二节语法和词汇知识(共l5小题；每小题l分，满分l5分)
从A、B、C、D四个选项中，选出可以填人空白处的最佳选项，并在答题卡上将该项涂黑。
We_____last night，but we went to the concert instead．
A．must have studied B．might study
C．should have studied D．would study
Everyone in our class was working hard and doing what we could _______ a good college.
| A．enter。m | B．to enter |
| C．entering。m | D．entered |
The wild flowers looked like a soft orange blanket _____ the desert.
| A．covering | B．covered | C．cover | D．to cover |
He hurried to the booking office only_________that all the tickets had been sold out.
| A．to tell | B．to be told | C．telling | D．told |
AIDS is said ______ the biggest health challenge to both men and women in that area over the past few years.
| A．that it is | B．to be | C．that it has been | D．to have been |
I don’t want _____ like I’m speaking ill of anybody, but the manager’s plan is unfair．
A to sound B to be sounded C sounding D to have sounded