引用旧文
Enclosed with this letter is a pre-addressed, stamped envelope ______ to mail
your application for membership to our club.
(A) which (B) in which (C) what (D) whenever
Answer is (B)
: 把句子拆解就一目了然
: Enclosed with this letter is a pre-addressed, stamped envelope.
: You mail your applications for membership "in" the envelope to our club.
: 第二句的the envelope用which取代接在第一句后面(此时作为介系词的in不可省略)
: Enclosed with this letter is a....envelope "in which"
: you mail your applications for....
: 可以代换成
: Enclosed with this letter is a....envelope in which "to mail"...
: (子句转不定词) 就成为原来的句子了
^^^^^^^^^^^^^^^^^^^^^
我要问的是，为什么可以转不定词阿，省略you....
另外，我重写这题三次，都再错，没有理解的很透彻，
是不是要先理解 “ mail sth. in... ”这个用法阿。