be to do也有对的时候?

GWD 26-17

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.

答案选C啊，但我选E 不是说be to do都是错的吗？而且E中还保留了may

C.     astronomers have developed a scale to rate how likely

a particular asteroid or comet will be to

MM看一下 这个其实是在考be likely to do 然后它的将来时态就是 a particular asteroid or comet will be how likely to do...

还有一种你可能碰到的be to do正确的情况是 the first thing will be to do...这里的考点是the first to do然后它的将来时就是 the first thing will be to do 所以有时候看似是在说be to do其实是有别的搭配

MM看一下 这个其实是在考be likely to do 然后它的将来时态就是 a particular asteroid or comet will be how likely to do...

还有一种你可能碰到的be to do正确的情况是 the first thing will be to do...这里的考点是the first to do然后它的将来时就是 the first thing will be to do 所以有时候看似是在说be to do其实是有别的搭配