题目内容

2-2-3、DHCP服务为何要实现保留IP地址功能，其在网络地址管理中有什么好处？在做保留IP地址时，为什么要现记录需保留IP地址的客户机网卡的物理地址(MAC地址)？

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1. Jenny wants her grandparens this satur

A. visit
B. visiting
C. to visit

2. My parents ask me waste time online.

A. to
B. not to
C. to not

3. They don't have much time with me.

A. to stay
B. stay
C. stays

4. It's good to talk about your problems with your friends or parents.

A. to you
B. for you
C. of you