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The worsening of global warming, _____human activities are to blame, has led to frequently extreme weather.
#78724
A
by which
B
for which
C
that
D
what
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When deeply absorbed in work, ________ he often was, he would forget all about eating or sleeping.
#78684
A
that
B
which
C
where
D
when
、The virtues of thrift(节俭)and hard work is vital for everyone,        is often the case in any society.
#78643
A
as
B
that
C
when
D
where
 Jane,       I’ve shared just about everything since the first day of kindergarten, spent the weekend with me last month.
#78622
A
who
B
for whom
C
with whom
D
that
Next winter, ____I’ll stay in Jilin City, will surely be another exciting holiday.
#78707
A
which
B
when
C
that
D
where
 ________ is known to us all is that the old worker, for _______ life was hard in the past, still works hard in his seventies.
#78656
A
As; whom
B
What; whose
C
It; whose
D
What; whom
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