We must come to a decision and take action quickly, for time is ____faster than we think.

We must strengthen our _____ on the western border.

A) offense

B) defects

C) defense

D) defendants

A.must have come

B.should have come

C.would have come

D.might have come

Fanny insisted that we ______ the day before.

A) come B) should come C) came D) must come

We have come to a critical moment. You must take immediate___.

A、 act

B、 action

C、 activity

D、 doings

We have come to a critical moment. You must take immediate_____.

A. action

B. act

C. activity

D. do

A.break down

B.come down

C.settle down

D.slow down

A.mustn’t

B.needn’t

C.can’t

D.may not

A.No, you needn't.

B.No, you mustn't.

C.Will you？

D.No problem.