单项选择题

A．A complicated system of several food chains.
B．A society that distributes food.
C．The relationship of one green plant to another.
D．The device that spiders use to catch food.
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单项选择题
A．The food served at the stands is tasty and healthy.B．The food the supermarket sells attracts the attention of the students.C．Students think the service in the school cafeteria is not good enough.D．Students got sick after they had a meal m the school cafeteria.
A．The food served at the stands is tasty and healthy.
B．The food the supermarket sells attracts the attention of the students.
C．Students think the service in the school cafeteria is not good enough.
D．Students got sick after they had a meal m the school cafeteria.
单项选择题
A．They are pleased with their new automobile.B．They use different means of transportation every day.C．They don’t normally drive on this mute.D．They will have to change buses again.
A．They are pleased with their new automobile.
B．They use different means of transportation every day.
C．They don’t normally drive on this mute.
D．They will have to change buses again.
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