— I was lucky to win a gold medal in the

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问题选择题

— I was lucky to win a gold medal in the 800-metre race.

— You _____ through tough training. [ ]

A. must go

B. should go

C. must have gone

D. should have gone

答案

答案：C

选择题

His uncle went abroad in 2010, and __________ since.

A．had not been heard of

B．has not been heard of

C．had not heard of

D．has not heard of

问答题简答题

试述测视温度时要求？