______ the terrible pollution, so many beautiful fish are fast disappearing in the river.
| A．According to | B．Because of | C．Because | D．As a result |
-- You are always full of _______. Can you tell me the secret?
-- Taking plenty of exercise every day.
| A．power | B．strength | C．force | D．energy |
We held a party on Christmas Eve at a hall _______ with colourful balloons and flowers.
| A．to decorate | B．decorating | C．decorated | D．being decorated |
After the heavy snow, many students helped to clear away the snow ______ in our school.
| A．willingly | B．sincerely | C．properly | D．calmly |
We went through a period_______ communications were very difficult in the countryside.
| A．which | B．in which | C．whose | D．with which |
Professor James will give us a lecture on the Western culture, but when and where _______ yet.
| A．hasn’t been decided | B．haven’t decided | C．isn’t being decided | D．aren’t decided |