单项选择题

By mentioning Internet, the author means that

A．we are always online and always connected.
B．the wireless technology will be popularized as the Internet.
C．the Internet will be wireless soon.
D．the wireless technology will become a monopoly.

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单项选择题

From the last paragraph we can conclude that

A．siblings are not in the range of scientific research.
B．people learned management skills from family playroom.
C．spouses learned negotiation skills from their sisters and brothers.
D．studies on siblings are on their way.

单项选择题

Studies on siblings by scientists used to

A．be totally forgotten.
B．focus only on the sons not daughters.
C．mainly focus on the orders of the kids.
D．focus on the sibling dynamic.