一Government has taken actions to stop water and air ( pollute).
一Yes.Clear waters and green hills are as good as mountains of gold and silver.
Mary doesn't (real) care if her friends are the same or different.
If I'm available tomorrow afternoon,I (visit)the city museum with my brother.
We couldn't do all the work by ( us).
Look!The students (answer)the questions carefully.
We've got 3﹣day holiday (include)New Year's Day.