Children’s brains can’t develop properly_______ they lack protein
#80031
A
when
B
since
C
because
D
unless
推荐题目
Why not stay at home ______ the road is so slippery after the heavy snow?
#31389
A
so long as
B
in case
C
so far as
D
now that
Some people get in touch with each other by mobile phones__________ others keep contact with each other by e-mail.
#31283
A
when
B
before
C
while
D
since
______ it is required to follow the grammatical ruled when witting English,there are always some exceptions.
#80527
A
Unless
B
while
C
As
D
Since
Some students even have no idea of they are studying, so they are aimless most of the time.
#30606
A
who
B
when
C
where
D
why
Information has been put forward _____ more middle school graduates will be admitted to universities.
#32052
A
while
B
that
C
when
D
as