One theory, ________ suggested by Harvard University, is that humans began cooking their food, thereby releasing nutrients locked in the raw food and reducing the time needed to chew it.
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A
which
B
as
C
that
D
what
推荐题目
Not until midnight______back from work, drunken .
#73737
A
he did come
B
he came
C
didn't he come
D
did he come
After five years of preparation，Shanghai presented the world ______ many said was the greatest Special Olympics.
#72235
A
when
B
what
C
where
D
which
（天津市河东区201 4年高三二模考试）12. Jim wanted to keep fit, so he spent as much time as he_______ exercise.
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A
could taking
B
took
C
to take
D
could take