I hear Mr. Brown will be our new manager. —-Right. His experience him for the position.

Are you going to Shanghai by train?—No. I’m taking car.

Tom, you should be polite and let our grandpa get the car first.— OK. And I will open the door for him.

________ do you help your mother clean the house? — Once a week.

________of the chemical factories in their city _________pouring waste water into the river. It’s too dangerous.