Never______ such a difficult problem. It took me almost half an hour to work it out.
#80170
A
had I come across
B
I had come across
C
did I come across
D
I did come across
推荐题目
Only in this way_______progress in your subjects.
#83752
A
you make
B
can you make
C
you are able to make
D
will you able to
If Joe' s wife goes to the party, _______.
#81146
A
so does he
B
so will he
C
he will either
D
either he does
Only in this way ______ from your friends.
#81604
A
you can learn
B
can you learn
C
can learn you
D
you learn can
The room, although_________ to be kept locked, was often left open.
#80986
A
supposing
B
supposed
C
to be supposed
D
having supposed
Since everyone has come back here,＿＿＿.
#83876
A
on goes our discussion
B
goes on our discussion
C
on does our discussion go
D
does on our discussion go