Many towns and villages had their water supply ________ because there was no electricity.
| A．cut through | B．cut off | C．cut up | D．cut down |
Many teens don’t get enough sleep because they have too much homework, which ____ them up at night.
| A．makes | B．breaks | C．turns | D．keeps |
As time went by, the plan stuck ____ fairly practical.
| A．to proved | B．to proving | C．proved | D．to be proved |
—You didn’t invite Mary to the ball?
—____ her, too?
| A．Must I invite | B．Should I have invited |
| C．Must I have invited | D．Should I invite |
It was believed that things would get worse, but ____ it is they are getting better.
| A．before | B．after | C．because | D．as |
—What field will your son go into after graduation from Nanjing University?
—I’m not quite certain, but he ____ a good teacher of English.
| A．promises | B．becomes | C．makes | D．proves |