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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