题目内容

He stayed there for quite a long time, during ________ time he learned much spoken English.

A. that
B. this
C. which
D. same

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Fill in the blanks with the words or expressions given below. Change the form where necessarey.

请选择下列乐器哪个发出是乐音。

A. 鼓
B. 钹
C. 钢琴
D. 小军鼓

请选择下列乐器是噪音？

A. 二胡
B. 琵琶
C. 扬琴
D. 钹

音的性质