Question

[nguyễn ngọc trang]

People need to breathe. If they don’t breathe, they (1) ____________ die. But how clean is the air people breathe? If they breathe (2) ___________ air, they will have breathing problems. Plants and animals need (3) __________ air too. A lot of the things in our lives create harmful gases and (4) _________the air dirty, like cars, motorbikes, and factories. Dirty air is called polluted air. Air pollution can also make our Earth warmer.The problem of air pollution stared ( 5 )...... the burnin a lot of coal in homes and factories

5) a: with  b)of   c) at   d) on

Answer 1

[Lê Nguyên Hạo]

People need to breathe. If they don’t breathe, they (1) ______on______ die. But how clean is the air people breathe? If they breathe (2) _____with______ air, they will have breathing problems. Plants and animals need (3) ____of______ air too. A lot of the things in our lives create harmful gases and (4) ___at______the air dirty, like cars, motorbikes, and factories. Dirty air is called polluted air. Air pollution can also make our Earth warmer.The problem of air pollution stared ( 5 )....of.. the burnin a lot of coal in homes and factories

Answer 2

[ncjocsnoev]

People need to breathe. If they don’t breathe, they (1) ______on______ die. But how clean is the air people breathe? If they breathe (2) _____with______ air, they will have breathing problems. Plants and animals need (3) ____of______ air too. A lot of the things in our lives create harmful gases and (4) ___at______the air dirty, like cars, motorbikes, and factories. Dirty air is called polluted air. Air pollution can also make our Earth warmer.The problem of air pollution stared ( 5 )....of.. the burnin a lot of coal in homes and factories