_____ at the door before you come into the room.
| A．Hit | B．Knock | C．Touch | D．Strike |
We should try our best to leave our generation a world better than________we were given.
| A．it | B．one |
| C．the one | D．those |
—Can you accompany your little brother to the post office now?
—________，if he is ready.
| A．By all means | B．No way |
| C．My pleasure | D．In no case |
As everybody knows，kangaroos are native________Australia and are often regarded as one of Australia’s national treasures.
| A．in | B．to |
| C．from | D．with |
There is________as a free dinner in this world.As the saying goes，“No pains，no gains.”
| A．no such a good thing | B．such no good thing |
| C．no such good thing | D．not so a good thing |
Linda’s health is improving________day by day，and the doctor has advised her to stay home for a couple of weeks.
| A．frequently | B．gradually |
| C．fluently | D．actually |