---_____________ are they? --- They are fine.
.--Many people are wondering __________ in the forest.--It’s reported that a burning cigarette bar caused it.
--Look! There is a lot of litter on the floor. Please ______.--OK, we will.
Recycling means waste can be put to ______ and be brought back to life.
--Why don’t you get used to the life in Beijing?-- ______ the crowded traffic ______ the high living cost. The only reason is the badly polluted air.
--What’s the result of killing the sharks?--If the number of the sharks ______, the other ocean lives will be in danger as well.