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______electric wires are made from copper or lead is common practice.A、WhatB、Wh
______electric wires are made from copper or lead is common practice.A、WhatB、Wh
游客
2023-11-13
12
管理
问题
______electric wires are made from copper or lead is common practice.
选项
A、What
B、Whether
C、That
D、How
答案
C
解析
主语从句题。句子主语为——electric wires are made from copper or lead。句子谓语为is common practice。当主语从句结构、意义完整时,用that引导,尽管that不作任何成分,没有意义,但不能省略。
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