Scientists have created GM tomatoes which ______ fresh for 4

Scientists have created GM tomatoes which ______ fresh for 45 days, three times as long as normal tomatoes.
A.are stayed B.have been stayed C.stay D.stayed
恋风恋歌8459 1年前 已收到1个回答 举报

zhouyuwoailang 幼苗

共回答了22个问题采纳率:100% 举报

C

考查时态。which引导的定语从句是说明转基因西红柿的一般性质,故用一般现在时;又因为stay是连系动词,故选C。

1年前

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