It is important that we_______ with all that_______ in the struggle.
| A．should unite; be united |
| B．would like;can be united |
| C．should unite; could unite |
| D．unite; can be united |
She’s already an hour late, What _____to her?A can have happened B may happenC should have happened D may have happened
As it tuned out to be a small house party, we ____ so formally.
| A．needn’t dress up | B．couldn’t have dressed up |
C．didn’t need dress up | D．needn’t have dressed up |
— The woman biologist stayed in Africa studying wild animals for 13 years before she returned. — Oh, dear! She ______ a lot of difficulties!
| A．may go through | B．might go through |
C．ought to have gone through | D．must have gone through |
To be on the safe side, we should fill up the tank now, because we ______ run out of gas on the way.
| A．can | B．would | C．might | D．should |
There used to be a small school,___________?
| A．was there | B．wasn’t it | C．usedn’t there | D．usedn’t it |