单项选择题

A．An automobile collision.
B．An air crash.
C．The noise of a crowd.
D．An explosion.
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单项选择题
A．Do extra work if necessary.B．Change the spark plugs only.C．Clean the spark plugs only.D．Charge her more than ￡ 10 if necessary.
A．Do extra work if necessary.
B．Change the spark plugs only.
C．Clean the spark plugs only.
D．Charge her more than ￡ 10 if necessary.
单项选择题
A．He’s taking a break from studying.B．He has already finished studying,C．He was assigned to watch a program by his professor.D．He’s finding out some information for a friend.
A．He’s taking a break from studying.
B．He has already finished studying,
C．He was assigned to watch a program by his professor.
D．He’s finding out some information for a friend.
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