【題目】In the 19th century, gold ______ in California, America.

A.discoveredB.will discoverC.is discoveredD.was discovered

【答案】D

【解析】

句意：在9世紀(jì)，金子在美國(guó)的加利福尼亞被發(fā)現(xiàn)。

考查一般過(guò)去時(shí)態(tài)的被動(dòng)語(yǔ)態(tài)。discovered一般過(guò)去時(shí)態(tài)；will discover一般將來(lái)時(shí)態(tài)；is discovered一般現(xiàn)在時(shí)態(tài)的被動(dòng)語(yǔ)態(tài)的結(jié)構(gòu)；was discovered一般過(guò)去時(shí)態(tài)的被動(dòng)語(yǔ)態(tài)的結(jié)構(gòu)；根據(jù)主語(yǔ)gold和discover之間是被動(dòng)關(guān)系，所以用被動(dòng)語(yǔ)態(tài)；根據(jù)in the 19th century在19世紀(jì)，所以用一般過(guò)去時(shí)態(tài)；故選D。

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