单项选择题

We consider it important that a plan（）before doing a work.

A、 to be made
B、 should make
C、 be made
D、 will be made

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单项选择题
Mrs. smith,（）is a retired teacher, does volunteer work at the hospital.

A、 she
B、 who
C、 as
D、 that
单项选择题
John regretted（）to the meeting last week.

A、 not going
B、 not to go
C、 not having been going
D、 not to be going
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