. If only I ________ how to operate an electronic computer as you do.
#89384
A
had known
B
would know
C
should know
D
knew
推荐题目
If the president had visited the hospital this morning, it ________ the headline in tomorrow's paper.
#87202
A
will be
B
could be
C
had been
D
was
Imagine what today’s life would be like if Alexander Bell _____ the telephone more than 130 years ago!
#87256
A
didn’t invent
B
wouldn’t invent
C
hadn’t invented
D
wouldn’t have invented
"You know so much about literature. It's a pity you failed your degree," Harry said, "You ______ a good teacher."
#90111
A
would have been
B
can have been
C
must be
D
should have been
— Mary’s sister looks very beautiful now.— But she was very ugly before she tidied up her appearance（整容）. You _________ believe it!
#87061
A
shouldn’t
B
mustn’t
C
wouldn’t
D
might not