If only I_____how to operate a computer as you do! 
#89926
A
had known
B
wou欤?know
C
should know
D
knew
推荐题目
We __________ booked. Look, this restaurant is almost empty.
#87437
A
mustn’t have
B
can’t have
C
should have
D
needn’t have
It’s a fine day. Let’s go fishing, _____.
#90211
A
won’t we
B
will we
C
don’t we
D
shall we
The book I bought from the bookstore isn’t here. Who __________?
#89207
A
could have taken it
B
must have taken it
C
might take it
D
should take it.
It is difficult, so I suggest that you       __ it to an expert.
#87494
A
should leave
B
will leave
C
are leaving
D
may leave