17The movie is to deucate people about environmental problems ______our planet

I can still recognize Mr Johnson, who is standing by the door, even though he looks ___different now

in Super Girls that Duan Linxi became known to almost all teenagers.

He has to_________ 20 yuan on the book. ButI needn’t _______ any money for it.

The war made ______ impossible for the scientist to go on with his research