【题目】按要求完成下列各题。

1. I know they are students. (变为一般疑问句)

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2. They speak English in Australia. (对画线部分提问)

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3. The capital city of Australia is Canberra. (对画线部分提问)

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4. This is a beautiful beach. (变为复数句)

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5. Kangaroos live in Australia. (对画线部分提问)

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