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IT IS EASY (DO/ DOING/ TO DOING/ TO DO) THIS EXERC...
IT IS EASY (DO/ DOING/ TO DOING/ TO DO) THIS EXERCISE .
DE+DAP AN KSCL CN /10 11
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3. It is easy (do/ doing/ to doing/ to do) this exercise .
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3.
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DE+DAP AN KSCL CN /10 11