永远不要为了结交朋友或保持友谊而做一件错事.
Never do a wrong thing to a or keep one.
I have been learning English for over 9 years. (对画线部分提问)
have you been learning English?
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.