题目内容
An earthquake is a shaking of the ground that occurs when rock beneath the surface of the earth changes position.
A.a great many B.a great mass of C.a number of D.a plenty of
B
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题目内容
An earthquake is a shaking of the ground that occurs when rock beneath the surface of the earth changes position.
A.a great many B.a great mass of C.a number of D.a plenty of
B