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
You will have to wait for one more week, _____ the manager will be back from his trip.
#73463
A
after
B
while
C
when
D
since
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.
Why not stay at home the road is so slippery after the heavy snow?
#69407
A
when
B
unless
C
even if
D
now that
You should try to get a good night’s sleep _______ much work you have to do.
#67750
A
whenever
B
however
C
whichever
D
whatever