How was _______dinner at Mike’s house –It was great. Mike’s mum is ________wonderful cook.

She _____ when I go to see her.

__ the _____ of modern industry, thepollution is becoming more and more serious

Dad, must I practice the piano today—No, you _. You may do it tomorrow.

Look! The man at the gate _______be our headmaster. He is always standing there every morning.—No, it_______ be him. He is holding a meeting in the office now.