求教GWD26-17

Responding to the public’s fascination with-and sometimes

undue alarm over-possible threats from asteroids, a scale

developed by astronomers rates the likelihood that a particular

asteroid or comet may collide with Earth.

A.     a scale developed by astronomers rates the likelihood

that a particular asteroid or comet may

B.     a scale that astronomers have developed rates how

likely it is for a particular asteroid or comet to

C.     astronomers have developed a scale to rate how likely

a particular asteroid or comet will be to

D.     astronomers have developed a scale for rating the

likelihood that a particular asteroid or comet will

E.      astronomers have developed a scale that rates the

likelihood of a particular asteroid or comet that may.

答案为什么是C 而不是D

为什么大家不觉得E是最好的答案呢?

Astronomers, to help deal with public fascination, and sometimes undue alarm, about possible threats from asteroids, devise scale that rates likelihood that particular asteroid or comet will collide with Earth;

Comets - News - Science - The New York Times - [ 翻译此页 BETA ]
            

可是表目的不是不能用for doing 吗？

E選項還是不對，因為E的用字和 New York Times 上的用字不同。

E不對的原因是，likelihood 與 may 同時用，語意重複，但是 NYT卻是用will。

D 不對的原因在於表目的要用 to + verb

现在好多for doing都作答案的啊

will be to 有人见过这种用法么？