No matter how bright a talker you are, there are times when it's better __________ silent.
| A．remain | B．be remaining |
| C．having remained | D．to remain |
19. Johnson ______ for 5 years for political reasons when he was young.
| A．was put in prison | B．was in the prison | C．out in prison | D．was in prison |
二。单项选择题（共13分）
18. You are very ______ to be late again unless you get there by bus.
| A．likely | B．possible | C．probable | D．Proper |
35．You have broken your promise；you______painting the house long ago．
| A．could have finished | B．had better finish |
| C．must have finished | D．should have finished |
34．Wow! Look at the man and his horse ________are running down the road.
A．which B．that C．who D where
33．A cool rain was falling_________with snow causing heavy traffic．
A．mixed B mixing C．to mix D．having mixed