问题

It is generally believed that Watson and Crick’s discovery about DNA was __ beginning of _ enormous advances in ___ field of genetics.

A:the, the, the
B:/, /, the
C:the, /, the
D:the, the, a ;

正确答案是：

同类题型

The building______ last spring is a hospital for children and women.

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Someone is ringing the doorbell. Let’s see _______.

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