Đặt câu hỏi cho từ gạch dưới

MAKE WH-QUESTION WITH THE UNDERLINED WORDS(đặt câu hỏi cho từ gạch dưới)

1.     Their guests left for home because it was very late.

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2.     I have to tidy the living room.

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3. The secretary gave Mr. Green a lot of information.

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4.     The two men returned to the office at three o’clock.

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5.     My mother often goes to work by bus

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