小题1:Trees can get light from in the daytime. A.C0 2 B.O 2 C.the sun D.the moon 小题2:Chlorophyll is in . A.sunlight B.soil C.air D.leaves 小题3:We can get more O 2 by . A.planting more trees B.cutting trees down C.making the water in soil(土壤) polluted D.making more CO 2 小题4:CO 2 from air and can produce food for trees with the help of chlorophyll and sunlight. A.water in the sea B.water from soil C.water in the river D.O 2 into air 小题5:The picture tells us . A.how trees let O 2 go into air in the sunlight B.how trees let CO 2 go into air in the sunlight C.the sunlight isn't important to trees at all D.trees can take in O 2 and let out CO 2