单项选择题

What does the second paragraph mainly discuss

A．Some animals and plants depend on each other for existence.
B．Some animals and plants develop their relationship easily.
C．Some plants depend on each other for food.
D．Some animals live better together.

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单项选择题

When the nurse talked to mum she thought mum was a______.

A．nurse
B．visitor
C．patient
D．cleaner

单项选择题

After reading the story what can we infer about the hospital

A．It is children's hospital.
B．It has strict rules about visiting hours.
C．The nurses and doctors there don't work hard.
D．A lot of patients come to this hospital every day.