【題目】No one knows who salt, but it's very helpful to our life.

A. invented B. discovered C. created D. found out

【答案】B

【解析】句意:沒(méi)有人知道誰(shuí)發(fā)現(xiàn)了鹽,但是它對(duì)我們的生活非常有用。invent發(fā)明,原來(lái)不存在,后來(lái)創(chuàng)造的;discover發(fā)現(xiàn),原來(lái)就存在;create創(chuàng)造,原來(lái)不存在;found out找到,查明,經(jīng)過(guò)一番努力獲得了結(jié)果。結(jié)合句意,鹽原來(lái)就存在,因此表示發(fā)現(xiàn),故選B。

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