Between the lectures is a 20 minutes’break，__________the students can get relaxed.
#75419
A
that
B
which
C
where
D
when
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I wish to thank Mr. Lord, without _______ help I would never have got this chance.
#76467
A
who
B
whose
C
whom
D
which
I travel to the Binhai New Area by light railway every day，________ do many businessmen who live in downtown Tianjin.
#75560
A
as
B
which
C
when
D
though
There is a natural phenomenon scientists call the greenhouse effect.
#78036
A
that
B
what
C
for which
D
who
Susan may have missed her train, in _______ case she won’t arrive for another hour.
#76746
A
that
B
what
C
which
D
whose