二:语法和词汇知识(共20小题,每小题1分,满分20分)。6._________we must keep in mind is that we must protect water and use it wisely.
---You seem to have had that car for years. ---Yes, I should sell it ________ it still runs.
.Most of the problems the government had been paying much attention to __ at last.
Last year many well-known singers did everything _______ help the people in the tsunami-hit countries.
John decided that he had to do something to _______ his anger .
If we keep wasting so much energy, _____are that our oil wells will dry up and the environment will be destroyed.