The boss has given everyone a special holiday, so we ________ go to work tomorrow.  

—     you play the piano at this time of the day ? I need a good rest for tomorrow’s test. — Sorry.  

Why _______ you be so stubborn? You should think over my advice on this matter.

According to our school rules, students ________ not carry mobile phones when taking a exam. 

—Did Ann fail in English?—She ________. Don't you notice that she looks depressed?