单项选择题

According to the passage, when are children first expected to study hard

A．Before 6 years of age.
B．Between 6 and 10.
C．After 10 years of age.
D．After 12 years of age.
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What can we learn from the conversation
A．Cold is a kind of serious illness.
B．Cold will go away quickly.
C．You should go to see a doctor.
D．You needn’’t do anything about it.
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What did the man do last weekend
A．He went skiing.
B．He studied.
C．He did nothing.
D．He did shopping.
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