He seems too tired today, and I wonder _________ he got a good sleep last night.
#30205
A
when
B
that
C
if
D
where
推荐题目
__ unemployment and crime are high, it can be assumed that the latter is due to the former.
#80573
A
Before
B
Where
C
Unless
D
Until
Steps must be taken _____ this kind of disaster will never happen again.
#31513
A
because
B
even if
C
so that
D
as
–I drove to Zhuhai for the air show last week.-Is that you had a few days off?
#77678
A
why
B
when
C
what
D
where
It’ll be a year and a half ______ the next Olympic Games are held in London in 2012.
#33408
A
since
B
when
C
before
D
until
_____ these experiments were successfully completed would we think of going into humans.
#31522
A
If only
B
So that
C
Only if
D
Even if