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4. My dog is playing in the yard now.
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Tom is playing games in the room.
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Their students are studying hard for the competition.
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5.
6.
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7. All of Jack's friends are singing and dancing at the party.
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8. My children are traveling around Asia now.
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9. Her little brother is drinking milk.
(-).
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10. His teacher is speaking English with the foreigner.
(-).
(?)