The hard-working peasants and their happy life _____ we saw in the countryside made a wonderful impression on us.
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A
/
B
who
C
which
D
whom
推荐题目
This is the hotel _______last month. 
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A
which they stayed
B
at that they stayed
C
where they stayed at
D
where they stayed
______ difficult the problem was, he tried his best to solve it.
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A
No matter
B
Although
C
Whatever
D
However
People are recycling many things which they      away in the past.
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A
had thrown
B
will be throwing
C
were throwing
D
would have thrown
_____ is known to us all is that America is a developed country _____ the First World.
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A
Which; belonging to
B
as; belonging to 
C
what; belonging to
D
It; belonging to