【題目】There are _____ living things on the earth， we must care for our home --- the earth.

A. million B. millions C. million of D. millions of

【答案】D

【解析】

試題分析：句意：地球上有成千上萬的生物，我們必須愛護我們的家園地球。millions of數(shù)百萬的。根據(jù)句意，故選擇D.

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