____ the 1990s, the number of antelopes had fallen to about 50,000.
A.During | B.Since | C.By | D.Over |
C
解析試題分析:句意,到二十世紀(jì)的九十年代之前,羚羊的數(shù)量已經(jīng)降到了50,000只。During在……期間Since自從By到某時(shí)間之前Over在……期間,這個句子用的是過去完成時(shí),故用By。
考點(diǎn):考查詞匯的辨析
點(diǎn)評:詞匯是學(xué)習(xí)語言的重要環(huán)節(jié)。要掌握好英語,記憶相當(dāng)數(shù)量的詞匯是必不可少的。英語中的每一個單詞,不僅表達(dá)一定的概念,具有一定的詞匯意義,而且在語音、拼法、語法等方面都有自己的特點(diǎn)。在學(xué)生學(xué)習(xí)英語的過程中,單詞、詞組記憶是基礎(chǔ)。解答這類題目,關(guān)鍵是理解題干意思以及各選項(xiàng)詞組的意思,可以像數(shù)學(xué)中的代入法一樣,依次把各個選項(xiàng)意思放入句子中進(jìn)行比較,不難選出正確答案。
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