【題目】The life-saving drug invented in 1897, which ________ aspirin, has helped increase the standard of people’s health greatly.

A. was called B. is called C. has been called D. had been called

【答案】B

【解析】

考查動(dòng)詞時(shí)態(tài)。句意：誕生于1897年的救命藥，阿司匹林，極大地提升了人們的健康標(biāo)準(zhǔn)。Which引導(dǎo)非限制性定語從句，補(bǔ)充說明先行詞drug，而該從句陳述客觀事實(shí)，故用一般現(xiàn)在時(shí)，故B切題。

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