At the back of our house stands________.
| A．a tree of 30 metres tall |
| B．a 30metretall tree |
| C．a tall tree 30metre |
| D．a 30 metres' tall tree |
As long as we present in spreading scientific knowledge among the masses, all the strange beliefs are to go out of our life.
| A．necessary | B．important | C．difficult | D．bound |
As a good teacher, he should use different ways to encourage all children to realize their full and achieve their goals.
| A．possibility | B．conception | C．potential | D．difference |
The car factory has produced a new car of high quality; its only is that it uses a lot of petrol.
| A．advantage | B．drawback | C．mistake | D．profit |
The government has had to with the opposition party on the new regulation, which will come to effect next month.
| A．negotiate | B．bargain | C．connect | D．associate |
His sacrifices for the country were never officially , which made all of us feel discouraged.
| A．acknowledge | B．appealed | C．recommended | D．evaluated |