Do what you've been told; ___you'll be punished
#79927
A
and
B
if
C
otherwise
D
or
推荐题目
___________there are many different types of food, some animals spend their lives eating only one type.
#31689
A
Since
B
Unless
C
Once
D
While
27．In hot weather, an old tyre can break again easily _____it’s mended．
#79596
A
when
B
where
C
which
D
that
There’s no way of knowing why one man makes an important discovery ________ another man, also intelligent, fails.
#31181
A
since
B
if
C
as
D
while
--- I rang you at about ten, but there was no reply. --- Oh, that was probably _____ I was seeing the doctor.
#32012
A
for
B
why
C
when
D
how