请帮我讲解几个选择题吧

麻烦大家帮我讲解下列几道题吧？
Which and why?

谢谢大家了
1.Only take such clothes (_____) really necessary.
A.as were
B.as they are
C.as they were
D.as are

2.My Scottish friend says there is ( )monster in Loch Ness
A.no such thing as
B.no such thing as a
C.no such a thing as
D.no such a thing as a

3.It was as a physician that he presented himself,and ____ he was warmly received.
a. as such
b. such as
c. so that
d. as that

4.Language belongs to each member of the society, to the cleaner
______ to the professor
a. as far as
b. the same as
c. as much as
d. as long as

5."The door was open."
"It___ open, I had locked in myself and the key was in my pocket."
a can't be
b. mustn't be
c.can't have been
d. mustn't have been

请帮我讲解几个英语句子，谢谢！ 帮我做几个选择题吧 谢谢 请老师帮我做几个选择题,谢谢! 几道英语选择题帮我讲解下~ 请讲解几道选择题~ 请高手为我讲解这些英语选择题(下) 请高人帮我讲解华人受到西方国家歧视的几个历史原因？ 帮我解答几个选择题!谢谢.! 请帮我讲解以下几道题 选择题讲解