一道prep 上的语法题,请大牛们帮忙看看!谢谢

zxtcomeo · 发表于 2010-5-4 20:09:12

scientists have idetified a asteroid ,2000bf19,that is about half a mile wide and (if it strikes earth,it can do tremendous damagemous to part of the plant but probably not cause plantwide destruction)

b and, if it would strike earth ,part of the plant could experience a tremendous amount of damage but it would

c andthat,if it were to strike earth,could do tremendous damage to part of the plant but would

d and that,if earth is struck by it,can do part of the plant tremendous damage ,but it would

e and that ,if it strikes earth,it could experience tremendous amount of damage but
括号内为划线句子! 我不明白的是为什么非要用that 引导,用两个独立并列句子(比如A)为什么不行?

小货舱 · 发表于 2010-5-5 10:32:15

C 对么

zxtcomeo · 发表于 2010-5-5 12:28:33

c对,为什么a不对

一道prep 上的语法题,请大牛们帮忙看看!谢谢

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