31．The foreign visitors were filled with joy when they_____ foot_____ Chinese soil.
| A．made; on | B．put; in | C．set; on | D．stopped; in |
Many people agree that the electronic newspaper is a _____as great as the invention of printing, which will change our whole way of life.
| A．concept |
| B．consequence |
| C．decision |
| D．breakthrough |
Anyway, we shouldn't the law of nature and overuse the limited resources; otherwise, we will have to pay the price for it.
| A．give up |
| B．go against |
| C．break through |
| D．push ahead with |
He struggled his path of knowledge, so he _____to enter university:
| A．succeeded |
| B．managed |
| C．attempted |
| D．tried |
_____ reading may take up too much of your time, it is very helpful in raising your grades efficiently.
| A．Because |
| B．As |
| C．Once |
| D．While |
What do you think _____ if he knew the matter?
| A．to happen |
| B．would happen |
| C．to have happened |
| D．had happened |