Is oxygen the only gas _______ helps fire burn? 
#95032
A
that
B
/
C
which
D
it
推荐题目
—Why are the tax collectors so busy?  —Many people prefer to have their tax forms completed by a professional rather than ___. 
#94782
A
do it themselves
B
doing it themselves
C
to do it themselves
D
done by themselves
I don’t think it is teachers who ______ for giving students too much pressure.
#93167
A
are to blame
B
are going to blame
C
are to be blamed
D
should blame
You may not have played very well today, but at least you’ve got through to the next round and ________.
#93081
A
tomorrow never comes
B
tomorrow is another day
C
never put off till tomorrow
D
there is no tomorrow
Never before ________ buying a computer, but now it seems a necessity in my everyday life.
#93867
A
did I think of
B
have I thought of
C
I thought of
D
I have thought of