单项选择题

I would appreciate_____very much if you could give me some advice.

A、this.
B、that.
C、it.
D、you.

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单项选择题

John has cut his smoking_____to three cigarettes a day.

A、down.
B、off.
C、out.
D、up.

单项选择题

以局域网方式接入Internet的个人计算机,_____。

A、没有自己的IP地址
B、有一个动态的IP地址
C、有自己固定的IP地址
D、有一个临时的IP地址