4.Computer is one of the greatestinventions(發(fā)明).It's very useful.

分析 電腦是最偉大的發(fā)明之一.它很有用.

解答 答案:inventions 根據(jù)所給詞,可知對應(yīng)的單詞有動詞invent和名詞invention.根據(jù)the greatest(最偉大的),可知其后需要名詞.根據(jù)one of the greatest,可知其后的名詞需要為復(fù)數(shù)形式,為最…之一.故答案為inventions.

點評 本題考查名詞.首先根據(jù)漢語,寫出單詞,其次根據(jù)其在句子中的位置和成分,判斷出正確的詞性,最后,根據(jù)one of判斷出應(yīng)為名詞的復(fù)數(shù)形式.

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