—That must have been a pleasant experience.
— yeah, we ourselves.
A．have been enjoying B．enjoyed
C．were enjoying D．had enjoyed
time tomorrow, I would teach you how to play the piano.
A．Had I had B．If I would have C．If I have D．Were I to have
The boy hot on the forehead. He must be sent to the hospital at once.
A．is felt B．felt C．feels D．was felt
—It looks as if it’s going to rain, but I’m not sure whether the windows are shut in my apartment.
—You as well go back to have a look.
A．should B．might C．need D．can
The number of sharks has fallen greatly in the past three years, so measures must be taken to oppose sharks illegally.
A．people to hurt B．people from hunting
C．people hurt D．people’s hunting
Since no evidence has been found so far he was guilty, he has to be set free.
A．before B．whether C．that D．when
