题目内容

（）正弦电路中，瞬时值要小写：u、i。

A. 对
B. 错

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Tom exchanged his penJohn’s toy.

A. to
B. for
C. in

He wants to play table tennis but can’t find a _________ (搭档).

A. classmate
B. partner
C. person

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A. nervous
B. worried
C. upset

You may ask your ___________ neighbor to keep an eye on your house while you’re away.

A. next-room
B. next-wall
C. next-door