20.Over 1,500 languages are spoken in the world.

分析 世界上有1500多種語言在被說.

解答 答案:spoken.
首先結(jié)合首字母s根據(jù)語境推測句意是"世界上有1500多種語言在被說.",句子表述的是一般性的事實(shí),所以用一般現(xiàn)在時(shí),主語  languages 是動(dòng)作 speak的承受者,所以用被動(dòng)語態(tài),一般現(xiàn)在時(shí)被動(dòng)語態(tài)的構(gòu)成是:主語+am/is/are+動(dòng)詞的過去分詞,所以答案是:spoken

點(diǎn)評 做這類題型,首先根據(jù)所給單詞首字母明確句子所要考查的單詞的拼寫,再結(jié)合相關(guān)語法知識(shí)對單詞做出形式上的變化.

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