Do they have to finish this homework before 6 o'clock(câu chủ động) Should we bring some food to the campsite Had she brushed her teeth before going to bed ..............................................
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Do they have to finish this homework before 6 o'clock(câu chủ động
⇒ Do this homework have been to finished before 6 o'clock ?
Do they have to finish this homework before 6 o'clock
=> Do this homework have been to finished before 6 o'clock
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