________ there are living creatures in the outer space as those on Earth hasn't been proved until now.
#30306
A
How
B
When
C
Where
D
Whether
推荐题目
Tony decided to study abroad _______ he knew he would meet many difficulties.
#31529
A
as if
B
because
C
unless
D
even if
regular exercise is very important.It’s never a good idea to exercise too close to bedmme.
#32899
A
It
B
As
C
Although
D
Unless
The wise parents can tell whether their children are telling the truth_____ they listen to their excuses to wrong deeds.
#80472
A
the first time
B
for the first time
C
every time
D
for every time
When it is your turn to talk, what I want to tell you is ______you can show respect by making sure the listener understands ______ you are saying and is interested.
#31915
A
that；what
B
this；which
C
where； that
D
which； when