单项选择题

(It is) always (easier) to (select) a tool than to (use them).

A．It is
B．easier
C．select
D．use them
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单项选择题
______ you return those books to the library immediately you will have to pay a fine.
A．Until
B．Unless
C．If
D．Provided
单项选择题
The more (frequent) the child expresses his (interest) in (an) activity, the stranger (it) will become.
A．frequent
B．interest
C．an
D．it
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