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He made another wonderful discovery, _________ of great importance to science.
#78371
A
which I think is
B
which I think it is
C
which I think it
D
I think it is
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He flew to Paris two hours ago，           he would stay for three days.
#77062
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there
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which
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when
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where
This is the house_____my grandma lived twenty years ago.
#77752
A
in that
B
in which
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— Why does she always ask you for help?            — There is no one else _______, is there?
#76913
A
who to turn to
B
for her to turn
C
for whom to turn
D
she can turn to
He has made another wonderful discovery, _____ I think is of great importance to science.   
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which
B
what
C
when
D
that
 The tourists,        had enjoyed themselves so much in the botanic garden, were worn out
#75647
A
all of what
B
all of which
C
all of them
D
all of whom