Cars moved very slowly in the 1930s,but they A faster than in the 1920s.A.did move B.had movedC.would move D.were moving帮忙解决

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Cars moved very slowly in the 1930s,but they A faster than in the 1920s.
A.did move B.had moved
C.would move D.were moving帮忙解决

A.did可省把move加d,但这里加个did是强调的意思

20世纪30年代比20世纪20年代速度要快!所以应该选B 已经发生过的 用现在完成式! 这几年级的题目?

did 为一般过去时态!

did这里是强调