－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

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科目：高中英語 來源： 題型：022

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科目：高中英語 來源：學(xué)習(xí)高手必修三英語人教版 人教版 題型：022

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When you travel in a forest, you should be carefu _________ snakes and some other wild animals．

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