3.A:Whataretheydoing?Aretheyreadingmagazines?B:No.They’rethe(扫地).4.MrBlackisamodelplaneinhis(卧室).
3. A: What are they doing? Are they reading magazines?
B: No. They’re ____ the ____ (扫地) .
4. Mr Black is ____ a model plane in his ____ (卧室) .
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