1 . — Why don’t you enter the office? They are waiting for you.
— The door ________ open, no matter how hard I pushed.

A．won’t

B．can’t

C．mustn’t

D．needn’t

2 . As a smoker, you ________ remember that the damage passive smoking does to people’s health and people’s lives is also very serious.

A．can

B．would

C．must

D．might

3 . In the new TOFEL test, there are questions ________ test takers ________ read, listen and then speak into a microphone.

A．which … must	B．which … need
C．where … must `	D．where … need

4 . Waking up suddenly________lead to rapid heart rate and high blood pressure.

A．must

B．would

C．can

D．shall

5 . I wonder why we________ eat out all the time when we can cook our own meals at home.

A．may

B．would

C．should

D．must

6 . Just as I was hurrying to class, there ________ come Tom with a long story to tell you.

A．could

B．must

C．might

D．would

7 . I asked in the bookshop about Will Dutton’s latest book, but all they           tell me was that it would come out before the end of the year.

A．might

B．must

C．could

D．should

8 . If fish are jumping higher than usual or frogs are croaking more loudly, it________ rain.

A．must

B．may

C．shall

D．need

9 . —Mom,_____I hang out with Susan now?
—No,you_____.It’s dangerous for two girls to be outside at night.

A．could;can’t

B．could;needn’t

C．should;can’t

D．must;couldn’t

10 . Public health experts kept telling citizens it was of utmost importance that social distancing and hygiene habits ________ amid the pandemic.

A．were to be kept	B．had to be kept
C．must be kept	D．should be kept