You’d better not . It is very bad for your health.

―Ben and sue aren’t home,are they―No.They to London on business.

Does the young man standing at the gate ____ the car — No The car is _____his father

Look！The man at the gate ____ be our teacher. He is always standing there every morning.—No，it ________ be him. He is having a meeting in the office now.

He used to ________ cards, but now he is used to ________ a walk after supper. [ ]