—Hi, why are you here?
—I ________ for Susan for 15 minutes.
A. have been waiting
B. have waiting
C. am waiting
D am been waiting
—I haven’t worked the problem out yet．What am I supposed to do?
—Try again!It’s only________difficult．
| A．a lot |
| B．a bit |
| C．too much |
| D．too many |
I’m not sure，but he’s supposed________sometime next week．
| A．return |
| B．returns |
| C．to return |
| D．returning |
—You must________the bottle before you take the medicine．
—OK，I will．
| A．break |
| B．shake |
| C．cover |
| D．throw |
—A number of foreigners come to see the Great Wall every year．
—Yes．It’s not only famous and beautiful but also the________of China．
| A．riddle |
| B．mark |
| C．capital |
| D．symbol |
This computer can’t work________．It needs to be fixed．
| A．mostly |
| B．normally |
| C．hardly |
| D．usually |