Combine the following sentences, using conditional sentences: 1. Tourists throw litter in the river. The water is polluted. -> If........................................................ -> Unless........................................................ 2. I don't drive too close to the animals on safari. They don't get scared. -> If........................................................ -> Were........................................................ Finish each sentences in such a way that it means the same as the sentence printed before it: 1. Hurry up or you will be late for the class. -> If........................................................ 2. My sister's got so much homework that she can't go out with her friends tonight. -> If........................................................ Giải thích giúp mình tại sao dùng câu điều kiện loại đó luôn nha

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