(2012年重庆联合诊断性考试)It is rather difficult to make friends with him，but his friendship，________，is more true than any other's.
| A．once gained |
| B．when to gain |
| C．after gaining |
| D．while gaining |
All visitors to the village ________ with claps.
| A．welcome | B．are welcomed |
| C．are welcoming | D．had been welcomed |
Christopher ________ charity work by raising a lot of money to promote medical research.
| A．came to | B．came up with |
| C．pulled through | D．got involved with |
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 |