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單項(xiàng)選擇題

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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單項(xiàng)選擇題

We failed in our（）to climb the mountain.

A.trial
B.contempt
C.desire
D.attempt

單項(xiàng)選擇題

If you want to learn something, you had better pay（）in class.

A.care
B.respect
C.attention
D.notion

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