1) Sorry! I am late ____________ the traffic. a) because b) because of 2) Their new product didn't sell well __________its poor quality. a) because b) because of 3) I couldn't attend the meeting _______ I was very ill. a) because b) because of 4) The soil is polluted, ______ the vegetables can't grow. a) so b) due to 5) The polluted water __________ the death of the fish. a) leads to b) so 6) The polluted water __________ the death of the fish. a) causes b) because 7) We have to wear a mask __________ air pollution. a) due to b) because of c) Both A & B

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