There is a river around our town. It is about ______ long.
A．6 hundreds kilometersB．6 hundred kilometers
C．6 hundreds kilometerD．6 hundred kilometer
B
考查數(shù)詞的用法。句意“這條河環(huán)繞著我們鎮(zhèn)，大約有600Km長。”當(dāng)hundred前有具體數(shù)字時，不用復(fù)數(shù)，排除A、C；kilometer“千米”，在此應(yīng)該用復(fù)數(shù)，排除D。故選B。
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