单项选择题

How is food for plants made Food for plants is made （）

A．from water
B．from the air in the sky
C．from the soil
D．from water, things in the soil and air and sunlight

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单项选择题

A．remember
B．wonder
C．receive
D．accept

单项选择题

A．do
B．help
C．use
D．take