________ unemployment and crime are high，it can be assumed that the latter is due to the former.
#30434
A
Before
B
Where
C
Unless
D
Until
推荐题目
___ we know some basic knowledge concerning AIDS, we can protect ourselves from being infected.
#33392
A
If only
B
Even if
C
So long as
D
Unless
______ the police thought he was the most likely one, since they had no exact proof about it, they could not arrest him.
#80600
A
Although
B
As long as
C
If only
D
As soon as
_______ there are many different types of food, some animals spend their lives eating only one type.
#30197
A
Since
B
Unless
C
Once
D
While
—How long has John been here? — Two years, _______ he still has no friends.
#30856
A
and
B
so
C
but
D
or
It is not what you said but the way you said it ____ made him angry.
#33746
A
what
B
which
C
who
D
that