单项选择题

If ______ in the fridge, the fruit can remain fresh for more than a week.

A．kept
B．keeping
C．be kept
D．to keep
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单项选择题
Mary does not dare to go out at night in case ______.
A．she will see something frightening
B．she should see something frightening
C．she sees something frightening
D．she saw something frightening
单项选择题
We consider it of great importance ______ children should form the habit of being ready to help others.
A．when
B．if
C．that
D．where
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