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.
#67116
A
which
B
as
C
that
D
what
推荐题目
I don’t know ______ he will come tomorrow. ______ he comes , I’ll tell you.
#41016
A
if ; Whether
B
whether; Whether
C
if ; That
D
if ; If
The idea for the new machine came to Mr. Baker ______ to his invention recently.
#72375
A
while devoting
B
while devoted
C
while he was devoted
D
while devoting himself.