Traffic safety officials predict that drivers will    be equally likely to exceed the proposed speed   limit as the current one.

A.     equally likely to exceed the proposed speedlimit as

B.     equally likely to exceed the proposed speed limit as they are

C.     equally likely that they will exceed the proposedspeed limit as

D.     as likely that they will exceed the proposedspeed limit as

E.      as likely to exceed the proposed speed limit  as they are.

答案为E

但这道题目一直没想明白为什么选E?

Traffic safety officials predict that drivers will

be as likely to exceed the proposed speed limit  as they（drivers ） are likely to exceed the the current one（speed limit）