John promised his doctor he _____ not smoke and he has never smoked ever since.
| A．might | B．should | C．could | D．would |
I am going to meet Tom __________ they say is a good boy.
| A．who | B．whom |
| C．whose | D．which |
Ladies and gentlemen, please fasten your seat belts. The plane __________.
| A．takes off | B．is taking off |
| C．has taken off | D．took off |
Do you know the reason __ he was late?
| A．of which | B．for that | C．for which | D．of that |
The teacher asked us_______ in deep water
| A．don’t swim | B．not swim | C．not swimming | D．not to swim |
It was in the street ______I met xiao zhang_____the fire took place
A.which/which B.that/that C where /that D why/that