---Must I return the magazine to you right now, Sandy?---No, you _____.You may keep it until next Wednesday.
--- May I go swimming now? --- No, you ______. You must finish your homework first.
_____ middle school students allowed to use mobile phone at school ?
Great changes _____ in my hometown since 1980.
About of the students in our class come from the countryside.
I had a little trouble English grammar.