We must take measures to protect endangered wildlife _______ it is too late.
#80090
A
now that
B
as long as
C
unless
D
before
推荐题目
_______ we start thinking and believing we can do it, anything is possible.
#32281
A
Since
B
While
C
Until
D
Once
Christina wasn’t saying anything, but the professor smiled at her _______she had done something very clever.
#31695
A
as if
B
now that
C
while
D
though
We need to think outside of box _____ we are to come up with something really new.
#79748
A
so that
B
as long as
C
once
D
if
—Don't you think it too expensive?—Never mind ________ the price is; if it is what we need we'll buy it.
#30303
A
what
B
how much
C
how
D
how many