单项选择题

Every knife and fork __________ carefully.

A. have cleaned
B. has cleaned
C. have been cleaned
D. has been cleaned
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单项选择题
A major is superior ______ a captain. A) to C) for B) in D) on
A major is superior ______ a captain.
A) to C) for
B) in D) on
单项选择题
It is well known that there are some ______ to every grammtical rule.
A. exceptions
B. ways
C. answers
D. invitations
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