We can never forget the days _______the two astronauts in spaceship worked together and the days _______we spent together.
#76008
A
which; when
B
when; which
C
what; that
D
on which; when
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----- Believe it or not, my sister and I are twins. ----Oh, you must have had the case ________ you were taken for your sister.
#77875
A
which
B
whose
C
where
D
whom
Gun control is the subject ________ Americans have argued for a long time.
#78176
A
which
B
with which
C
about which
D
of which
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