The retired workers were invited to the company， ________surprise，changes had been so great over the years.
| A．whose | B．who | C．to whom | D．to whose |
___________________ to sunlight for too much time will do harm to one’s skin.
| A．Exposed | B．Having exposed | C．Being exposed | D．To expose |
With her health ____________________, she had to quit the job she loved.
A. broken down B. broke downC. having broken down D to break down
She is popular among her classmates, ________________ she can be annoying at times.
| A．in case | B．as if | C．even if | D．so that |
— Margaret _____________ stay at home all day long in front of the computer.
—That' s right．She should go to the fitness center with us.
| A．doesn’t have to | B．couldn’t | C．oughtn’t to | D．may not |
The flood this summer caused serious _______________ to the crops in Northeast China.
| A．damage | B．harm | C．hurt | D．injury |