题目内容

Could you please tell us ________ two computers are the cheapest among these?

A. which
B. what
C. that
D. whether

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______ you have done things like that before doesn’t matter.

A. That
B. Whether
C. What
D. If

Now there is a danger ______ the area pollution kills all the plants here.

A. if
B. whether
C. /
D. that

Father made a promise ______ he was free he would take us to the Great Wall.

A. that
B. if
C. that if
D. whether

The reason why she was late for work is _____ her bike was broken.

A. why
B. because
C. that
D. because of

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