Question

【題目】By the 10 century, Old English __________ the official language of English.

A. has become B. became

C. had become D. would become

Answer 1

【答案】C

【解析】A. has become現(xiàn)在完成時(shí)；B.became一般現(xiàn)在時(shí)；C.had become過去完成時(shí)； D. would become將來時(shí)。句意：在10世紀(jì)，古英語(yǔ)成了英語(yǔ)的官方語(yǔ)言。可知此句應(yīng)使用過去完成時(shí)。故選C。