----- Nội dung dịch tự động từ ảnh ----- heat water, it boils 1 If you .......... heat / water / it / boil 2 If you . send / an e-mail / it / be / free ............. 3 It . be / dangerous / you / not / wear /a seatbelt 4 If you .. have / an injection / it/not / usually hurt ............. 5 If you . not / water / plants and flowers / they die .................. 6 If the sea not / be / calm / not / be / safe / to swim
