“If only we _________ about this service before!”
A.had known
B.knew
C.could know
D.could have known

I wish I _________ time to see more exhibitions.
A.was having
B.had
C.have had
D.would have had

I’m really sleepy today. I wish I _________Bob to the airport late last night.
A.weren’t taking
B.hadn’t had to take
C.didn’t have to take
D.didn’t take

Frankly, I’d rather you _________ anything about it for the time being.
A.don’t do
B.hadn’t do
C.didn’t do
D.haven’t done

The children sing loudly__________.
A.as if they were the winners
B.as though they are the winners
C.though they are the winners
D.were they the winners

Everybody feels sorry for him and says that “If only he_________ more time revising.”
A.should have spent
B.would have spent
C.had spent
D.spent

My electronic dictionary _____ me to listen to the pronunciation of new words.
A.enables
B.enable
C.able
D.ability

This photograph is too small. Can you ____ it for me?
A.large
B.largely
C.enlarge
D.enlargement

I didn't understand what you just said. Could you _____ it?
A.clear
B.clarity
C.clarify
D.clarified

He loves insects. He can _____ over 50 different types of beetles.
A.identity
B.identify
C.identified
D.identifies