1) He ______________ stepping on trees a) is b) isn't c) not is 2) She ___________ saving water a) isn't b) is c) not is 3) He is _________________ litter a) stepping on b) saving c) dropping 4) He is _____________________ litter a) wasting b) picking up c) dropping 5) She _____________ wasting water a) not is b) isn't c) is 6) He ____________ planting a tree a) not is b) is c) isn't 7) She is ________________ comics a) reading b) read c) listening 8) He's _______________ fast a) runing b) run c) running 9) She ____________ playing the violin a) not is b) isn't c) is 10) He ______________ taking photos a) is b) isn't c) not is

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