1 . All the students have been informed that under no circumstances ________ the equipment in the science labs for personal affairs.

A．we could use

B．may we use

C．we may use

D．did we use

2 . The professor ______ sit in his study for hours when he worked on the new project.

A．could

B．might

C．would

D．should

3 . English is a language that many people around the world ___________ not speak perfectly but ___________ at least understand.

A．may; can	B．would; might
C．will; must	D．could; might

4 . ——Is there a bullet train to Chengdu this afternoon?
——There          be．I’ll phone the station to find it out．

A．must	B．can
C．might	D．would

5 . — What are you doing this Saturday?
— I’m not sure, but I       go to the Rolling Stones concert

A．must	B．would
C．should	D．might

6 . －Are you coming to the English evening?
－I’m not sure. I go to the concert instead.

A．must	B．might
C．should	D．would

7 . Although this ____ sound like a simple task, great care is needed.

A．must

B．may

C．shall

D．should