—Don't you know that a proper amount of exercise a day will ________ to a person's health?
—No wonder so many senior citizens do exercise in the square.
| A．construct | B．conclude |
| C．distribute | D．contribute |
—Excuse me, could you tell me where the post office is?
—__________, but I’m a stranger here．
| A．I’m not sure | B．I’m sorry | C．That’s righ | D．I’m afraid not |
He may not even drink water at night, _______ swallowing insects possibly floating on the surface．
| A．in case of | B．for fear of | C．for the sake of | D．in line with |
I clean my room once a week, and the job _____ me two hours．
| A．costs | B．takes | C．pays | D．spends |
—Wow! You’ve got so many clothes．
—But _____ of them are in fashion now．
| A．all | B．both | C．neither | D．none |
When I talked with my grandma on the phone, she sounded weak, but by the time we ____ up, he voice had been full of life．
| A．were hanging | B．had hung | C．hung | D．would hang |