If only I_____how to operate a computer as you do! 
#89926
A
had known
B
wou欤?know
C
should know
D
knew
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He said he would rather not _____ it right now.
#90192
A
doing
B
to do
C
do
D
to be doing
—It was a red light, William. You ____ the car. —Sorry.  I didn’t see it. 
#87773
A
must stop
B
should stop
C
must have stopped
D
should have stopped
I supported him in time , otherwise he         off the bike .
#88986
A
might fall
B
would fall
C
should have fallen
D
would have fallen
--- What        it be? --- It         be a man, for it is not moving. It      be a dustbin, I think.
#87983
A
can, may, must
B
can, can’t, must
C
can, must, can
D
may, may not, could