人教版必修4_Unit3 A taste of English humour课件(共20张PPT)
人教版必修4_Unit3 A taste of English humour课件(共20张PPT)第3页

Revision

Point out the usage of the -ing form. 1. Our duty is serving the people heart and soul. 2. I heard a bell ringing. 3. My favorite sport is swimming. 4. There were a lot of people cutting rice in the fields.

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