单项选择题

Attendance at my lectures has （）considerably since my course was changed to an elective one.

A.fallen off
B.fallen over
C.fallen down
D.fallen on

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单项选择题
It is not easy to amuse （）on holiday.

A.one’s own
B.one itself
C.oneself
D.oneselves
单项选择题
The area can easily be （）if you know the length and the breadth.

A.worked out
B.sorted out
C.stretched out
D.straightened out
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