2. 外语
  3. All ______ is a continuous supply of the basic necessities of life.

All ______ is a continuous supply of the basic necessities of life.

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问题 All ______ is a continuous supply of the basic necessities of life.
选项 A、what is needed
B、for our needs
C、the thing needed
D、that is needed
答案D
解析 根据句子结构，我们可以看出，题目中句子结构完整，可以填入的只能是起修饰或辅助作用的成份，如定语或状语，D为正确答案，that is needed 在这里作定语，修饰先行词all。A错误，what不能引导定语从句，只能引导名词性从句。虽然 all the thing needed 符合句法(needed 是过去分词作定语修饰thing)，但是被all修饰的可数名词一般要用复数。
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