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Please don't be ________ by the text messages saying that you have won a shocking prize.

You had better ________ some time every day for sports so that you can keep yourself energetic.(2012·福建)

Emergency line operators must always ________ calm and make sure that they get all the information they need to send help.

—Take this medicine three times a day，Tom!
—Do I have to take it？It ________ so terrible.

Visitors ________ not to touch the exhibits.

(2013·濰坊三縣一模)If you don't work hard，it will be of no ________ for others to help you.

(2012·江西)You'd better write down the phone number of that restaurant for future ________.

(2012·湖北)It is important to have your eyes examined regularly to check for any sign of eye disease that may not have any ________.

(2012·福建)—Why do you choose to work in an international travel agency.
—Well，you know，English is my ________.So it is my best choice.

(2013·浙江，4)As the world's population continues to grow，the ________ of food becomes more and more of a concern.