六.选择填空(15分)
1. Great changes ______ in China in the past 20 years.
| A．took place | B．have taken place | C．were taken place | D．have been taken place |
-- The last one ________ pays the meal. --- Agreed.
| A．arrived | B．to arrive |
| C．arrives | D．arriving |
She had to leave school_______ her family couldn’t afford her education.
| A．although | B．unless |
| C．because | D．so |
The old man has retired from the factory. He _____ there for 30 years.
| A．works | B．worked |
| C．has worked | D．was working |
— I don’t mind telling you what I know.
— You _______. I can manage it myself.
| A．mustn’t | B．ought not to |
| C．can’t | D．don’t have to |
—Have you heard of the accident on this road last night?
—Yes. And there ________ three accidents here so far this year.
| A．are | B．were |
| C．have been | D．had been |