What do you think if we put both John and Jack in charge of the work? — Just John is OK. ________, you know.
Liu Xiang is ____ popular ____ many students are talking about him in and out of school. [ ]
Chinese people have been using paper for over______ years.
Who’s the girl in red?—Sorry, I don’t know ____. —____ is a new student.
If you still have a problem,you can ask the police ______help.[ ]