单项选择题

The reason (why) Jack (failed) to (attend) the lecture is (because) he had a bad cold.

A．why
B．failed
C．attend
D．because
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(Never before) (he had) felt himself (so) powerfully (attracted) to the scientific ideal.
A．Never before
B．he had
C．so
D．attracted
单项选择题
(Had the author) (see) that his novel (would) cause such a commotion, he (would not) have written it.
A．Had the author
B．see
C．would
D．would not
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