---What do you think of your parents?
---They always let me do ________ I think I should do.
| A．when | B．that | C．how | D．what |
The sportsman ________save a drowning boy that afternoon；the boy's parents appreciated him very much.
| A．might | B．could | C．was able to | D．must |
—Why are you unhappy today?
—The watch，which I ________the other day，is out of order again.
| A．had repaired | B．had repair |
| C．had it repaired | D．had repaired it |
Sarah looked at ______finished painting with ________satisfaction.
| A．/；a | B．a；the | C．the；/ | D．the；a |
Special attention should be paid ________our earth from________.
| A．to prevent；being polluted |
| B．to prevent；polluting |
| C．to preventing；being polluted |
| D．to preventing；polluted |
Most students at school hope that they can ________activities that appeal to them after class instead of just doing their homework.
| A．apply for | B．participate in |
| C．stick to | D．focus on |