—They are quiet, aren't they?
—Yes. They are accustomed __________ at meals.
| A．talk | B．to not talk |
| C．to talking | D．to not talking |
but he still can not understand it.
| A．Told many times |
| B．Having been told many times |
| C．He has been told many times |
| D．Though he has been told many times |
Mr. Lee, who as a guide for over 10 years, is now a manager in a big travel agency.
| A．worked | B．has worked | C．had worked | D．works |
In the school hall, where a meeting , some students are busy preparing for it.
| A．is held | B．has been held | C．is being held | D．is to be held |
the coming English speech competition will be a lot of work, so I need some volunteers to help out.
| A．Organize | B．Organizing | C．Organized | D．Being organized |
Rock-climbing is a breathtaking activity, very popular nationwide among young people,
cooperation as well as courage plays an important role.
| A．who | B．which | C．that | D．where |