单项选择题

Which of the following is NOT exactly among signs of bullying that alert parents, according to the passage

A．Over or under eating and bed wetting.
B．Moody outbursts and withdrawn behaviour.
C．Truancy and unwillingness to do homework.
D．Refusing to participate in extra-curricular activities.

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单项选择题

According to the passage, acid rain is

A．a source of pollution.
B．an effect of industrialization.
C．an advantage of industrial society.
D．a deposition of fossil fuels.

单项选择题

The author seems, in the last paragraph of this passage,

A．to alarm us against the terrible effects of acid rain.
B．to suggest that there are some ways to solve the problem.
C．to urge us to pass alternative stricter laws on pollution.
D．to remove the effects of acid rain from all around us.