Sam enjoys ______ stamps．And now he has 226 of them.
| A．collect | B．collected | C．collecting | D．to collect |
He has been here in this modern city for, just a few days, and he is about night life in this city.
| A．worried | B．innocent | C．particular | D．doubtful |
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 |