单项选择题

The ship's generator broke down, and the pumps had to be operated ______ instead of mechanically.

A. manually
B. artificially
C. automatically
D. synthetically
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单项选择题
He sent ______ to us that he would not be able to come.
A. the word
B. words
C. word
D. the words
单项选择题
Jack is ______. intelligent than his sister, but he failed in the entrance exam.
A. no less
B. no more
C. not leas
D. not so
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