——Hi, John. Are you busy?
——
| A．Yes.I do agree. |
| B．Yes.That would be nice. |
| C．No.Are you sure? |
| D．No.What’s up? |
Yang Liwei showed the flags of China and the United Nations, ________ the wishes of Chinese people to use space peacefully.
| A．expressing | B．expressed |
| C．to express | D．express |
-- 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 |