—There's someone knocking on the door.Who it be?—It must be Mary.She promised to be here at 8:00.
—May I swim here? — No, you _______. It is dangerous.
—Do you like your maths teacher? —Sure, because he is the teacher ___ helps me a lot.
—What is the date today? — It is _______.
—Which module is the most difficult in this book? — I think _____ module.
— Where is your mother? —She ________ the shop. She’ll be back in an hour.