There goes the bell for the class.Let’s stop___.
| A．to talk | B．to be talking | C．talked | D．talking |
The waste from the paper factory has poisoned all the fish to death--- _____ is left.
| A．nothing | B．no one | C．none | D．not anything |
You _____ her in her office last Friday, she’s been out of town for two weeks.
| A．needn’t have seen | B．must have seen |
| C．might have seen | D．can’t have seen |
Our success was largely _____ the good cooperation of all team members.
| A．because | B．result from | C．due to | D．thanks to |
. In our country, it’s a practice that workers have _____ for the Spring Festival.
| A．a week off | B．a week’s off | C．a weeks’ off | D．a week leave |
They are forbidden _____, for they are still middle school students.
| A．to smoking | B．to smoke | C．smoked | D．smoke |