____of the land in that district ___covered with trees and grass.
A. Two fifth, is
B. Two fifth, are
C. Two fifths , is
D. Two fifths, are (2000上海)
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Two ___died of cold last winter.
A. hundreds old people
B. hundred old people
C. hundred old peoples
D. hundred old peoples ('88MET.15)
It is not rare in ___that people in ____fifties are going to university for further education.
A. 90s,the
B. the 90s, /
C. 90s, their
D. the 90s, their ('99上海 6)
-Have you seen many sheep in the distance ? -Yes, ___.
A. thousand of them
B. two thousands of them
C. two thousand of them
D. two thousand them
刚体的转动惯量是刚体转动惯性的量度，与下列哪一项无关：
A. 刚体质量
B. 刚体转动快慢
C. 转轴位置
D. 质量分布
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