Mr. Obama paid a visit to China in November, 2009, _______, needless to say, must strengthen the Sino-US ties.
#77381
A
what
B
that
C
which
D
it
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His teacher is the only one ______ he can turn when he is in trouble.
#78032
A
in whom
B
to whom
C
for whom
D
from whom
Look out! Don’t get too close to the house____ roof is under repair.
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A
whose
B
which
C
of which
D
that
She heard a terrible noise, ______ brought her heart into her mouth.
#77597
A
it
B
which
C
this
D
that