Question

All these gifts must be mailed immediately__________ in time for Christmas.

A．in order to have received	B．in order to receive
C．so as to be received	D．so as to be receiving

Answer 1

C

試題分析：句意：所有的這些禮物必須馬上被寄出，為了及時讓這些圣誕節(jié)的禮物被收到。這里用so as to與in order to都可以表示目的，又因為gifts與receive之間是被動關(guān)系，故選C。
點評：本題難度適中。動詞不定式是高中重要的語法項目，它的各種形式的用法及區(qū)別必須能靈活掌握，這里主要考查的是它的被動形式。
即學即練：Dinosaurs have completely died out on the earth，never _________ again.
A. to be seen                    B. being seen
C. seen                          D. having been seen
解析：A。句意：考查不定式短語作結(jié)果狀語的用法。never to be seen again，意為：結(jié)果再也沒有人見過。