单项选择题

With summer coming on, the weather gets hot ______.

A．day and day
B．day and night
C．day by day
D．day in and day out
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单项选择题
Look, John must be in a hurry. He ______ his sweater inside out.
A．was wearing
B．wears
C．is wearing
D．wore
单项选择题
The tree fell down ______ she had time to run away.
A．as
B．after
C．before
D．until
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