单项选择题

—Are we supposed to take off our shoes before we enter
—No, you（）

A. shouldn't
B. needn't
C. mustn't
D. can't

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单项选择题
This radio is not working. I'll have it（）

A. repairing
B. to repair
C. repaired
D. be repaired
单项选择题
How long had it been bothering the patient（）

A. For a long time.
B. About 2 days.
C. More than one week.
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