GWD-9语法

kun861010

Scientists have identified an asteroid, 2000 BF19, that is about half a mile wide and, if it strikes Earth, it can do tremendous damage to part of the planet but probably not cause planetwide destruction.

A. and, if it strikes Earth, it can do tremendous damage to part of the planet but

B. and, if it would strike Earth, part of the planet could experience a tremendous amount of damage but it would

C. and that, if it were to strike Earth, could do tremendous damage to part of the planet but would

D. and that, if Earth is struck by it, can do part of the planet tremendous damage, but it would

e. and that, if it strikes Earth, it could experience a tremendous amount of damage but

为什么正确答案是c？我觉得时态和if那个从句，都是d对啊，请指教，谢谢

yhwut

D earth is struck， 被动不好
can不对，could才是表条件的。
do damage to 是固定搭配而不是do sth damage