题目内容

polite的副词是______。

A. impolite
B. politely
C. police
D. policeman

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我国使用的弹条型扣件主要分为（）型扣件。

A. Ⅰ
B. Ⅱ
C. Ⅲ
D. Ⅰ、Ⅱ、Ⅲ

Sometimes it is ______ hard for Western students.

A. a little bit
B. many
C. few
D. little

It is my first time _______ abroad.

A. study
B. to study
C. studied
D. studying

铁路中桥的长度为（）米。

A. 20
B. 20—100
C. 100
D. 小于100m且大于等于20