问题
The doctor had to work for ___after twelve o’clock.
A:by
B:with
C:off
D:over;
B:with
C:off
D:over;
正确答案是：
同类题型
he activities might seem childish, actually they require a lot of strength and determination.
1—Will Liu Xiang win in2012 Olympics—It ________his training.
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