题目内容

_______ computer games bring us a lot of pleasure, I don't think it wise to spend too much money and time on them.

A. Because
B. As
C. While
D. If

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_____ you are unable to deal with it, perhaps we should ask someone else for help.

Although
B. While
C. Since
D. Unless

_______ I have to give a speech, I get extremely nervous before I start.

A. Whatever
B. Whenever
C. Whoever
D. However

Air pollution is getting more and more serious, so we must take action ______ it is too late.

A. before
B. after
C. until
D. when

Provide your doctor with a detailed medical history ______ he can give you accurate treatment.

A. even if
B. in case
C. so that
D. as though