单项选择题

Dehydration may occur if there is a shortage of water（）

A.in your body
B.without water
C.before long
D.for a change
E.on a busy day
F.to your weight

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单项选择题Paragraph 2（）

A. Ounces of Water Needed Per Day 　　
B. Importance of Water 　　
C. Composition of Water 　　
D. Signs of Dehydration 　　
E. Supply of Water 　　
F. Necessity for Bringing a Bottle for Water with You

单项选择题Glucose cannot be turned into energy in the body（）

A．without diabetes．
B．without sugar．
C．without insulin
D．without food．