We _________ respect old people., should, shouldn't, We__________ keep our environment clean. , should, shouldn't, We_____________ spit on the floor. , shouldn't, should, We__________ give pregnant women or old people a seat in public transportation. , shouldn't , should, We _________ interrupt while someone is speaking. , should, shouldn't , We _______ use phrases like 'please, thank you, you are welcome' when we communicate with others. , should, shouldn't, We ____________ mock people. , should, shouldn't , We ____________ use other people's belongings without permission. , shouldn't, should, We __________ speak aloud in public. , should, shouldn't, We __________ deal with our smartphones while we are talking to someone. , shouldn't , should.

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