臣的部首:定语从句

来源:百度文库 编辑:查人人中国名人网 时间:2024/05/04 19:58:43
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
答案是C ,为什么不能选B呢? 谢谢大家.

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

因为that代的是前面特定的the machine,特定情况应该用that。