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  21.  Don't talk. We         (have) a lesson. 22.  Who          (teach) you Chinese this term? Mr Green. 23.  He         (see) a ten-yuan note on the ground just now. 24.  They          (live) in a small town last year, but this year, they       (move) to a city. 25.  Ben and his cousin        (catch) some insects in the park yesterday. |