Amazing it is, an astronaut’s superior position is filled with potential danger.
#30521
A
when
B
if
C
unless
D
as
推荐题目
When it comes to gossip(流言蜚语), learn to keep your mouth shut ________ you'll avoid trouble.
#30555
A
or
B
and
C
for
D
but
Don’t you know that Australia was, as a matter of fact, _________ used to be a nation of prisoners!
#31157
A
where
B
what
C
which
D
that
(2013·辽宁大连双基测试)________ a man's age, he can reduce it several years by wearing a confident smile.
#30547
A
Whichever
B
Whatever
C
Whenever
D
However
______ I admit that all these problems are difficult, I don’t agree that they can’t be solved.
#32853
A
Unless
B
While
C
Until
D
Since
We need some more facts and figures ______ we make the final decision.
#30185
A
since
B
before
C
after
D
until