单项选择题

In the Middle West, frost may appear in ______.

A．late spring
B．early spring
C．late summer
D．early autumn
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单项选择题
To make matters even worse, it rained ______ for five days after the big earthquake.
A．successively
B．successfully
C．succeedingly
D．exceedingly
单项选择题
The project will have to be given up ______ the government agrees to invest enough money.
A．unless
B．if
C．so that
D．until
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