. Don’t _______ your breath trying to persuade them; they’ll never listen.
| A．use | B．waste |
| C．spend | D．put |
______ where to go, he asked a passer-by for help.
| A．Having lost his way and didn’t know | B．Losing his way and didn’t know |
| C．Having lost his way and not knowing | D．Lost his way and didn’t know |
It is global warming, not other things, ______ the extreme weather.
| A．that have led to | B．which has caused | C．which are causing | D．that has led to |
Three students ______ Wenzhou Middle School took part in the Oral English Competition.
| A．represent | B．are representing | C．representing | D．represented |
With food, water and electricity ______, the villagers are suffering a lot.
| A．cut down | B．cut up | C．cut off | D．cut in |
The plan to be carried out next month needs ______ among the members of the labor union before ______.
| A．to discuss；carrying out | B．to be discussed；carried out |
| C．discussing；being carried out | D．discussed；to be carried out |