单项选择题

We have kept（）our friendship by writing to each other, so we are true friends.

A.back
B.up
C.off
D.down

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单项选择题It（）that I met one of my old classmates on my way home yesterday.

A.took place
B.occurred
C.broke out
D.happened

We advised him to give up smoking,（）a lot of exercise.A...

单项选择题We advised him to give up smoking,（）a lot of exercise.

A.to do
B.and to do
C.and do
D.and doing

The refrigerator is（）we must buy some food.A.bareB.blan...

单项选择题The refrigerator is（）we must buy some food.

A.bare
B.blank
C.hollow
D.empty

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