There are three ________ students in their school.
A．thousands ofB． thousand ofC． thousandsD． thousand
D
考查數(shù)詞的用法。hundred/thousand/million/billion等前面有具體數(shù)字時，不能用復(fù)數(shù)形式，且不與of連用；hundred/thousand/million/billion單獨使用，表虛數(shù)時，常用復(fù)數(shù)形式，且可以與of連用。根據(jù)three排除A、B、C。故選D。
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