All _______ is a continuous supply of fuel oil.

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问题 All _______ is a continuous supply of fuel oil.

选项 A、what is needed
B、that is needed
C、the thing needed
D、for their needs

答案B

解析当定语从句修饰的先行词前有all，any， no，only，little，much修饰，或者这些先行词本身就是 all，any，little，much，anything，nothing等不定代词时，一般应用关系代词that。因此B为正确选项。

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专业英语四级

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