Áp dụng công thức Wh - questions 1- She went to the doctor because she was sick. (gạch chân từ because she was sick) 2 - Nam left home at 7o'clock yesterday. (gạch chân at 7 o'clock ) 3 - He taught English in the high school. ( gạch chân taught English ) 4 - The homework was very difficult yesterday. (gạch chân very difficult) 5 - She often does the housework after doing exercise.(gạch chân after doing exercise) 6 - They are planting some roses in the garden. ( gạch chân some) 7- Liz will send these letters to her friends. ( gạch chân her friends) giúp mình vớiii

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