environmental damage is done, it takes many years for the ecosystem to recover.
| A．Even if |
| B．If only |
| C．While |
| D．Once |
Rain is pouring down from the sky without any sign of stopping．Farmers begin to worry about their crops since it _____ as long as 24 hours．
| A．would rain | B．had rained | C．was raining | D．has been raining |
We haven’t seen each other for many years, so I am quite _____ the plan that we have a party this weekend．
| A．in place of | B．in favour of |
| C．in honour of | D．in need of |
People working 10 or 11 hours a day are more likely to suffer from heart problems than_____ who go off duty after seven hours．
| A．those | B．that | C．these | D．them |
Be patient with your students ______ it takes time for them to adjust to their new way of school life．
| A．and | B．so | C．as | D．or |
People who get less than six hours of sleep per night have an increased _____ of dying early．
| A．custom | B．practice | C．disadvantage | D．risk |