請(qǐng)問為什么用during which period
請(qǐng)問為什么用during which period
Qian Xuesen was in America from 1935 to 1955,______________the research into jet planes.(concentrate)這是一個(gè)完成句子的題目.during which period he concenteated on
Qian Xuesen was in America from 1935 to 1955,______________the research into jet planes.(concentrate)這是一個(gè)完成句子的題目.during which period he concenteated on
英語人氣：149 ℃時(shí)間：2020-06-07 12:59:59
優(yōu)質(zhì)解答
這是一個(gè),______________the research into jet planes.這是一個(gè)定語從句來的,修飾前面的from 1935 to 1955,很明顯這是個(gè)時(shí)間段,要用during which（指from 1935 to 1955）.然后在這時(shí)間段內(nèi)發(fā)生的事,用一般現(xiàn)在時(shí),he concenteated on.period起什么作用呢？
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