Linda thinks it's easy to write Chinese words. （改为否定句）
Linda it's easy to write Chinese words.
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.