_____ a lot of small ads are put up on the walls, out city will be untidy.
| A．Until | B．Though | C．If | D．Unless |
—__________ will your father be back?
—In two months.
| A．How long | B．How soon | C．How often | D．How many |
_______ people lost their homes in Japan’s earthquake.
| A．Two thousands | B．Thousand | C．Thousands of | D．Thousand of |
The 30th Olympic Games will be held in London ________ 2012.
| A．at | B．on | C．in | D．for |
—Would you like some ___________?
—Yes, please. I’m thirsty.
| A．water | B．bread | C．pens | D．clothes |
—Shall we go out for a swim?
—Sorry, I can’t. I ______ housework for my mother now.
| A．am doing | B．is doing | C．are doing | D．did |