Qian Xuesen tried many times _________ he found the solution to the puzzle about space technology.
| A．after | B．before | C．since | D．when |
At the end of the football game, players traditionally __________ shirts __________ each other.
| A．change; with | B．exchange; with |
| C．change; to | D．exchange; to |
The exam __________ 10 experts from different universities.
| A．is consisted of | B．consists of |
| C．made up of | D．makes up |
The number of the people present at the meeting __________ 200, and a number of them __________ from Beijing, Tianjin and Shanghai.
| A．was; were | B．were; was |
| C．was; was | D．were; were |
—Would you mind answering some questions on shopping habits?
— __________.
| A．Yes, with great pleasure |
| B．No, I am afraid I can't make it. |
| C．Yes, it is worth the time |
| D．No, as long as it doesn't take long |
—What do you think of Andrew?
—There are some things that are not easy to __________ and his coldness is one.
| A．put aside | B．put away |
| C．put up with | D．put down |