Therealsolutionwillhavetobeanewkindofcardoesn'tusesomuchgas.where,when,how,which选which,求原因Longdistancetrainshaveneverbeencommonastheyareinsomeotherpartsoftheworldso,such,that,as,选as为什么不

Question

The real solution will have to be a new kind of car _____ doesn't use so much gas.
where,when ,how ,which
选which,求原因
Long distance trains have never been ___ common as they are in some other parts of the world
so,such ,that ,as,
选as为什么不能选so.

Answer 1

定语从句,先行词为 car,在从句中作 主语,故关系词用 which.
as  .as  句式 ,so  .as  只用于否定句,即 not  so...as   故选as