1) We should ........ a) drop litter b) cut down trees c) plant more trees 2) We shouldn't ............ a) pick up litter b) drop litter c) take care of animals 3) We should .......... a) pick up litter b) cut down trees c) drop litter 4) We shouldn't .....  a)  plant more trees b) cut down trees c) pick up litter 5) We should ....... a) take care of animals b) cut down trees c) hunt animals 6) We should ...... a) drop litter b) hunt animals c) help animals

should/ shouldn't

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