单项选择题

The increase of rickets in England was caused by__________.

A．windows
B．a tax
C．fog
D．bad weather
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单项选择题
Not too much of the plant faces the direct drying sunlight, so the cactus can_________.
A．keep the water it has stored
B．absorb much sunlight
C．store much heat from the sun
D．keep the food it has made
单项选择题
The cactus _________with its stems.
A．absorbs rains
B．makes food
C．sucks liquid
D．faces sunlight
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