—Be careful! Don't forget you are on a ladder.

—But you are holding it for me, nothing ________.

A．worry about 

B．to worry about

C．is worried about 

D．worrying about

B

句意：——小心點。別忘了你在梯子上�！悄惴鲋兀瑳]什么可擔心的。不定式to worry about作后置定語。

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