问题

It is human activities on the earth that areto _______ global warming.
A:a a
B:this
C:it
D:be responsiblewith
B:this
C:it
D:be responsiblewith
正确答案是:
同类题型
What’s in the newspaper —There __________ some news, two pictures and some storiesin it.
He couldn’t _____ the terrible working conditions in the factory and decided to leave at once.[ ]
ou do it, youwill feel that it comes easy
Tom has ________ that he lives a happy life.
We all had fun ________ in the supermarket ________ a sunny morning.