As a boy Mark Twain used to play practical jokes _____ all friends and neighbors.
A:on
B:of
C:with
D:at
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使用时()超过额定电压
A. 可以
B. 允许
C. 不得
D. 温度计
He had a cottage which consists _____ three rooms, a bathroom and kitchen.
A:of
B:with
C:in
D:by
A hinge joint is _____ permits forward and backward movement of a door.
A:the
B:whose
C:what
D:those