______ there are living creatures in the outer space as those on Earth hasn’t been proved so far.
#13957
A
When
B
How
C
If
D
Whether
推荐题目
To their great _______, they found their son arrived home safe before the storm.
#11914
A
surprise
B
relief
C
amazement
D
disappointment
David paused to consult his notes, and then _______ with his speech.
#13554
A
proceeded
B
pursed
C
pronounced
D
proposed
You don’t know ______ I want to see you again. It’s a year since I last saw you.
#13418
A
how soon
B
how long
C
how often
D
how much
I am ________ about what I say because careless remarks are likely to hurt others’ feelings
#13811
A
enthusiastic
B
concerned
C
cautious
D
doubtful
There are still many problem ahead of us, but by this time next year we can see light at the end of the ________.
#12906
A
battle
B
day
C
road
D
tunnel
