单项选择题

The science of medicine, ______ progress has been very rapid lately, is perhaps the most important of all sciences.

A．to which
B．with which
C．in which
D．among which
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Then ______ of that time when he was cowboy.
A．comes the memory
B．came the memory
C．the memory comes
D．the memory came
单项选择题
If only I ______ the books on the reading list before I attended the lecture.
A．read
B．have read
C．had read
D．could have read
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