40. The passport originated as a traveler’s official letter of introduction _
__________ by his country and ___________ to foreign governments.
(A) issued, addressed
(B) issuing, addressing
(C) issued, addressing
(D) issuing, addressed
答案为什么是A 我选C
6. Getting students in school is ___________; getting them out with the knowle
dge they require is ___________.
(A) one, other
(B) one thing, another
(C) one, another thing
(D) one thing, other thing
答案B 我选C 请问是没有这种用法吗？
7. There are logistical challenges ___________ adopting this innovative model
of business operation.
(A) be
(B) to
(C) if
(D) so
这题为什么是B 不太会翻～
求解释 不好意思问题有点多