单项选择题

The main idea of the passage is that ______.

A．teachers should do as little as possible in helping students learn to read
B．teachers should encourage students to read as widely as possible
C．reading ability is something acquired rather than taught
D．reading is more complicated than generally believed
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单项选择题
Which of the following can be inferred from the passage
A．Advances in medical science made disease unable to regulate human population growth any longer in many parts of the world.
B．Medical cures have prolonged life but upset the reproductive age group by increasing many populations.
C．In Australia, the use of the myxomatosis virus hardly controlled the rabbit population with increasing resistance to the disease.
D．It is discovered all strains of virus can parasitize and kill the bacteria without harming the organism that the bacteria has infected.
单项选择题
Attempts to introduce myxomatosis into New Zealand to control rabbit population have failed, mainly because ______.
A．increasing resistance to the disease is becoming apparent
B．there are no species of insects transmitting the disease in this country
C．flea and mosquito without the disease are absent in this country
D．the myxomatosis virus has been introduced into Australia
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