单项选择题

Cars do cause us some health problems-in fact far more serious()than mobile phones do.

A. one
B. ones
C. it
D. those

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单项选择题
In India it is considered impolite ().

A. to use the right hand for passing food at table
B. to pass food with the left hand
C. to eat food with your hands
D. to help yourself at table
单项选择题
—I haven’t got the reference book yet, but I’ll have a test on the subject next month.<br> —Don’t worry. You () have it by Friday.

A. could
B. shall
C. must
D. may
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