We also had different students in some classes, so ______was a struggle to remember all the faces.
| A．it | B．this | C．that | D．one |
It is required that no smoking ______ in the school.
| A．was allowed | B．be allowed |
| C．would be allowed | D．had been allowed |
The dress is not ______ for the formal party. You’d better find another one.
| A．appropriate | B．convenient | C．available | D．actual |
He was unable to make such progress, _______.
| A．as he tried hard |
| B．as hard he tried |
| C．so hard did he try |
| D．hard as he tried |
—Did you remember to give Jenny the video tape?
—Yes. _______ I saw her.
| A．So long as |
| B．Any time |
| C．Whenever |
| D．The moment |
Parents should take seriously their children’s requests for sunglasses _______ eye protection is necessary in sunny weather.
| A．because | B．through |
| C．unless | D．if |