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1 They are watching TV at the moment
(-) They aren't watching TV at the moment.
(?) Are they watching TV at the moment?
2 Mrs Chung is teaching English at Yendung high school No3 at present
(-) Mrs Chung isn't teaching English at Yendung high school No3 at present.
(?) Is Mrs Chung teaching English at Yendung high school No3 at present?
3 . Lan and Hoa are practising speaking Chinese
(-) Lan and Hoa aren't practising speaking Chinese.
(?) Are Lan and Hoa practising speaking Chinese?
4 Mrs John is listening to Pop music in the sitting - room
(-) Mrs John isn't listening to Pop music in the sitting - room.
(?) Is Mrs John listening to Pop music in the sitting - room?
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