They have to work at once, _______?

A. can they B. can’t they C. don’t they D. haven’t they

C 【解析】句意：他們必須馬上工作，不是嗎？反義疑問句，前面是肯定句，后面是否定形式，have to 是一般現(xiàn)在時，用助動詞don’t。故此處為don’t they，故選C。
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科目：初中英語 來源：江蘇省鹽城市鹽都區(qū)2018屆九年級第一次模擬考試英語試卷 題型：填空

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Last but not least, you should watch your food. Eat food which is high in water, starch（淀粉）and

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As long as you pay attention to the above, playing sports safely in the heat isn’t a difficult thing.

How to keep 1.when playing sports in summer

Facts

? Some people do exercise 2. in the sun for long in hot summer.

? Some sports players are sent to hospitals because the3.is too high.

4.

? Drink water and play sports safely. But too many bottles of sports drinks may do

5.to you.

? Take enough 6. during summer exercise. When you feel uncomfortable, let your coach know right now.

7.sit in the sun when you have a rest. You’d better sit under a tree or go indoors for a while, which may help you keep active longer.

? Choose a proper time for practice. Remember to exercise as8. as possible to enjoy exercising on cool summer mornings. Sunset is a good choice as well.

? Be careful with your9.and have a balanced diet.

Conclusion

The more you pay attention to the10. , the safer you will be while playing outside in the heat!

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