choose the letter A,B,C or D to complete the sentences with give words 1 If/people/breath/contamination/air,they/have/ breathing/problems. A.if people breathed contaminated air,they had breathing problems B.if people breathed contaminated air,they would have breathing problems C.if people breath contaminated air,they will have breathing problems D.if people breath contaminated air,they will have breathing problems
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B.if people breathed contaminated air, they would have breathing problems
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