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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which
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as
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that
D
what
推荐题目
（天津市河东区201 4年高三二模考试）13. What he said brought the hours back to me_______ I was taken good care of in that far-[中away village.
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until
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that
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when
D
where
Jack wasn't saying anything, but the teacher smiled at him ________ he had done something very clever.(2011·湖南)
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as if
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in case
C
while
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though
Not to waste time searching, she kept everything just ________ she could get her hands on it.
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where
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as
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when
D
if
We were shocked at the news____________a 7.1-magnitude quake struck Yushu county on April 14th.
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whether
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that
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where
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Why