The river is said __________ in a fire during the past 10 years.
| A．to have polluted | B．it has been polluted |
| C．to pollute | D．to have been polluted |
He does help others, but he always expects returns ____. As a result, nobody will accept anything from him.
| A．at no time | B．in no time | C．for no time | D．after no time |
How can you expect others to believe you when you ___ constantly ___ lies!
| A．have; told | B．had; told | C．are; telling | D．were; telling |
My brother is always on medicine, so he has ___ table tennis to keep fit.
| A．taken up | B．built up | C．made up | D．held up |
No wonder he looks tired! He’s been studying for the exams all week, ____ he’s been working in a bar at night.
| A．while | B．but | C．plus | D．as |
____ quiet, for, you see, the baby is sleeping!
| A．To keep | B．Keep | C．Keeping | D．Kept |