单项选择题

John is always ready ______ others.

A．helps
B．to help
C．help
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单项选择题
Most of the desks and chairs in our school ______ wood.
A．are made of
B．are made in
C．are made by
单项选择题
Does the earth go ______ the sun
A．around
B．to
C．towards
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