Some researches have proved that water quality ____ due to too many dams and pumps in some areas.
| A．has been declined | B．is being declined |
| C．is declining | D．had been declining |
Great changes in every field _____ in the last ten years.
| A．take place | B．took place | C．have taken placed | D．had taken place |
This article ______ in a hurry was not so good.
| A．write | B．writing | C．to write | D．written |
She caught the student ______ in the exams.
| A．to cheat | B．cheat | C．cheating | D．cheated |
----I’m going to travel to America. Would you consider telling me about your experiences.
---- ____________. Let’s discuss over dinner.
| A．That’s all right | B．By all means |
| C．Go ahead | D．It just depends |
________hard you try, it is difficult to lose weight without cutting down the amount you eat.
| A．Whatever | B．However | C．Whichever | D．Whenever |