单项选择题

You'd better let me know as soon as there is a(n) ______ position in the branch office.

A. empty
B. vacuum
C. hollow
D. vacant
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单项选择题
Tom ______ in the paper as scheduled, but he was seriously injured two days ago.
A. was to hand
B. was to have handed
C. is to have handed
D. ought to hand
单项选择题
If the task ______ by the end of this year is delayed, the company will be under punishment.
A. being completed
B. is completed
C. to be completed
D. completed
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