单项选择题

I am not a diplomat now, but I （）.

A. used to
B. was used to
C. used to being
D. used to be

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单项选择题
If you pour oil on water, it （） float.

A. shall
B. will
C. can
D. may
单项选择题
The output of television sets has （） in the past five years.

A. more than doubled
B. more than double
C. as many as double
D. as much as double
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