放在水平桌面上的弹簧测力计，两个人分别沿水平方向向相反的方向拉它，弹簧测力计的示数为9N，两人用力的大小是[ ]

A．每个人拉力都是9N  

B．每个人的拉力是4.5N  

C．一个人用4N力，另一个人用519N力  

D．一人用力6N，另一个用力3N

根据中文提示写出单词或词组，使句意完整、正确。

小题1:We must ask him to give up           (抽烟). It’s bad for his health.

小题2:Robots cam make people             (懒惰).

小题3:You can           (抄写) the new words in the workbook.

小题4:We have all kinds of             (炊具) in Chinese food culture.

小题5:I live near my office. So I walk to work            (代替) going by car.