---Tom, why don’t we help our son work on his papers?
---We’ve already done more than we ________．He is on his own this time.
| A．would | B．should | C．could | D．might |
How long has your brother ___ the army?
| A．joined | B．taken part in | C．been | D．served in |
This is the only foreign film ___ I have seen this month.
| A．that | B．when | C．which | D．of which |
His mother was born in Greece, and Greek was her native language, ___.
| A．so it was with his father | B．so did his father | C．so was his father | D．so his father was |
While reading, you’d better make a mark ___ you have any questions.
| A．on which | B．at which | C．the place where | D．where |
Don’t keep your mouth ___ if you want to improve your spoken English.
| A．shut | B．shutting | C．shutted | D．to shut |