单项选择题

______before we depart the day after tomorrow, we should have a wonderful dinner party.

A．Had they arrived
B．Would they arrive
C．Were they arriving
D．Were they to arrive
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单项选择题
All our attempts to ______the child from drowning were in vain.
A．regain
B．recover
C．reserve
D．rescue
单项选择题
Ants food for the winter.
A．take up
B．put up
C．hold up
D．store up
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