单项选择题

Water ______to make crops grow in dry places.

A．
[A] needs

B．
[B] need

C．
[C] is needed

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单项选择题
All of the stores are ______on Sunday evening.
A．
[A] close

B．
[B] shut

C．
[C] closing
单项选择题
Young people choose to live their own lives, ______they are old enough.
A．
[A] even though

B．
[B] because

C．
[C] once
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