题目
In the absence of the regular teacher, they ______ her for another equally-qualified teacher for the day. (substitution)
In the absence of the regular teacher, they ______ her for another equally-qualified teacher for the day. (substitution)
题目解答
答案
这道题考察的是词汇的正确使用，特别是动词的选择。句子的意思是：在没有 regular teacher（常规老师）的情况下，他们______了另一位同样合格的老师来代替她一天。根据句子的意思，这里需要一个表示“替代”或“代替”的动词。
在提供的选项中，"substitution" 是名词形式，意为“替代”，但句子中需要一个动词。与 "substitution" 相关的动词是 "substitute"，意为“替代，代替”。因此，正确答案应该是 "substituted"。
完整的句子是：In the absence of the regular teacher, they substituted her for another equally-qualified teacher for the day.
但是，这个句子的结构有点不自然。通常我们会说 "substitute A for B"（用A代替B），但在这里，更自然的表达方式是 "substitute B for A"（用B代替A）。因此，更准确的句子应该是：
In the absence of the regular teacher, they substituted another equally-qualified teacher for her for the day.
不过，根据题目要求，我们假设句子结构已经固定，那么答案就是 "substituted"。
最终答案：substituted