________ are instructions that tell you what you are allowed to do and what you are not allowed to do.

题型：单选题题类：常考题难易度：容易

牛津版（深圳•广州）2017-2018学年初中英语七年级下册Module 3 Natural elements Unit 6 Electricity 综合复习

A、Systems B、Rules C、Methods

举一反三

— Yes. My aunt and uncle live there.

—Yes．It's Class 2．

—Two spoons, please!

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