…Do you like this movie?一Yes，it's the      one I’ve ever seen．

—You see, “Food Safety” receives thousands of Internet hits a day. —Yes, it becomes one of the _________ topics(话题) these days.

          you practice,            you can play the violin.

—What’ s the low-carbon life style like? . —Save       energy, produce        carbon.

 –You should be _______ careful when you take the chemistry exam.--I agree. In this way, I will make _______ mistakes.