1. Students are more aware of protecting the environment. Teachers teach environmental issues at school.(.Combine each pair of sentences to make a conditional sentence type 2) →If ……………………………………………………………………………………………… 2. Many rivers and lakes are poisoned.Factories produce waste and pour it into rivers and lakes. ( Rewrite the sentence, using ‘Because’) → Because ……………………………………………………………………………………… 3. He gets up early in the morning and he used to it.( Complete the second sentence so that it has similar meaning to the first sentence.) →He is used to ……………………………………………………………………………… 4.Although he had a good salary, he was unhappy in his job.(Rewrite this sentence, using the cue) → In spite of…………………………………………………………….. 5 Most ethnic peoples in Vietnam speak their own languagues( Make question for the underlined part ) →………………...........................................................................................................................