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
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
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
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
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
People need to breathe. If they don’t breathe, they (1) ____WILL________ die. But how clean is the air people breathe? If they breathe (2) ___DIRTY________ air, they will have breathing problems. Plants and animals need (3) ____CLEAN______ air too. A lot of the things in our lives create harmful gases and (4) ____MAKE_____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