Must / Must not

You .......... use your mobile phone in the classroom

I ........... give animals some water. They are very thirsty.

You............. ride the motobike on the right.

It's too late. I .......... go to school.

They ............ climb on the window. It's dangerous.

You .............. talk in classtime.

She .............. study english everyday.

You .......... open books in test time

You ............... do homework before going to school

You .............. eat snacks in classtime