⁠We should ___ more trees around our school., break, plant, waste, Please ___ the rubbish and put it in the bin., pick up, turn on, throw, ⁠We ___ the lights before we left the classroom., planted, switched off, won⁠, You ___ waste water. We need to save it., can, needn't, shouldn't, The students finished their project and felt very ___., hungry, afraid, proud

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