Tìm lỗi sai và sữa lỗi 1. You’re tired although you stayed up too late to watch TV last night. 2. We can’t swim in this river because of the water is awfully polluted . 3. We can save natural resources with using solar energy instead of coal, gas and oil . 4. The festival is called Passover . It is in the late March to early April.

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