单项选择题

The new policy may have protected the new city from being polluted as well as the life of its residents ______.

A．affected
B．affecting
C．is affected
D．having affected
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单项选择题
You ______ Donna to tell her the news yesterday. I have told her on the phone.
A．needn't write
B．mustn't write
C．needn't have written
D．mustn't have written
单项选择题
______ into step with this new consumer society, the managers of firms, shops, and corporation have to make a study of the market.
A．Falling
B．To fall
C．Having fallen
D．Fallen
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