（2014山东省实验中学高三第二次模拟考试）3．Lily took a few friends to my birthday party，none of __________ I was familiar with．
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A
which
B
whose
C
that
D
whom
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They promised to develop a software package by the end of this year, ________ they might have.
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A
however difficult
B
how difficult
C
whatever difficulty
D
what difficulty
While we _________, we saw a UFO land on a street.
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A
were shopping
B
shopped
C
are shopping
D
shop
There is a police car in front of the house of our neighbour's. _____ do you think _____ ？
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A
What；has happened
B
What；of happening
C
What；of being happened
D
Whatever；of happening
Recently I have bought an iPad 3 on the website of taobao. com, ________ the price is very reasonable.
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A
on which
B
in which
C
of which
D
from which
________ is known to everybody, Taiwan is a part of China. We must unify it.
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A
It
B
As
C
Which
D
What