Measures must be taken before there is another collapse of the coal mine, ______?
| A．must they | B．mustn’t they | C．is there | D．isn’t there |
Going on a trip into space must be quiteexciting experience.
| A．/ ; the | B．the; the | C．the; an | D．/ ; an |
After the school sports, our headmaster ______ the prizes.
| A．gave away | B．gave in | C．gave off | D．gave up |
________ to sunlight for too much time will do harm to one’s skin.
| A．Exposed | B．Having exposed |
| C．Being exposed | D．After being exposed |
I’m very happy _________ a chance to visit your country.
| A．to have given | B．to give | C．giving | D．to be given |
Zhongguancun made __________ for him to realize his dream.
| A．that possible | B．it a possible | C．that a possible | D．it possible |