单项选择题

The old gentleman never fails to help () is in need of his help.

A. whom
B. who
C. whoever
D. whomever

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单项选择题
The director had her assistant () some hot dogs for the staff members.

A. picked up
B. picks up
C. pick up
D. picking up
单项选择题
Only when you have a good knowledge of grammar () write correctly.

A. you will
B. you can
C. can you
D. can't you
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