英语问题求解答！！！！！！

如题所述

(1) Nanjing is one of the hottest cities in China in Summer

(2) if you would like to lose weight , you need to exercise more

(3) They have to work for two days and nights without sleep to finish the work

(4) This room is used to have meeting every week

(5) It is necessary to (这里看不清楚）children a sense of keeping themselves safe

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