16．It is known that oil ________ on water．（　　）
A．floatsB．floatedC．was floatedD．is floated

分析 眾所周知，油會(huì)漂浮在水上．

解答 答案：A．
根據(jù)句意"油會(huì)漂浮在水上"可知，這是一個(gè)一般性的客觀事實(shí)，結(jié)合主句的be動(dòng)詞為現(xiàn)在時(shí)，可知，應(yīng)該使用一般現(xiàn)在時(shí)．故選A．

點(diǎn)評(píng) 本題考查了一般現(xiàn)在時(shí)態(tài)的用法；做此類題時(shí)，可以根據(jù)句中所表達(dá)的內(nèi)容確定該句應(yīng)使用的時(shí)態(tài)．

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