It is not until recently ______ there are many different kinds of hearing defect

游客2023-11-19 77

问题 It is not until recently ______ there are many different kinds of hearing defects.

选项 A、have the scientists discovered
B、the scientists have discovered
C、that the scientists have discovered
D、that will the scientist have discovered

答案 C

解析本句是强调句式，所以原本由于否定词在句首需要主谓颠倒的句式，在强调句里就不需要再倒装了。

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