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

A、 kept
B、 keeping
C、 be kept
D、 to keep
单项选择题
Do you mind keeping a(n)（）on the flowers for us while we are away

A、 hand
B、 look
C、 eye
D、 view
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