52._________A. sheltersB.foodsC.disastersD. water

Paragraph 2__________. 查看材料A.Ounces of Water Needed

Paragraph 3__________. 查看材料A.Ounces of Water Needed

Paragraph 4__________. 查看材料A.Ounces of Water Needed

_________（47）A.disappearing into the water below.

_________（48）A.disappearing into the water below.

_________（49）A.disappearing into the water below.