定语从句With the development of science and technology,the moder
定语从句 With the development of science and technology,the modern aeroplane is not the machine__when first invented. A)what it was B)which it was C)that it was D)the one was ,为什么不能选B呢?
这个我来告诉你 定语从句中 关系代词(that,which,who等)在从句中做表语时,只能用that为引导,并且that可以在口语中省掉 你这句that指代的是the machine在从句中作表语所以只能用that引导 eg.he is no longer the man (that) he was. 他不再是从前的他