题目
They are operating the factory with very small material supplies, so they have to underline(economize) wherever they can. (economy)
They are operating the factory with very small material supplies, so they have to $\underline{economize}$ wherever they can. (economy)
题目解答
答案
根据题意，"economy" 需要转化为动词形式以适应句式。"Economy" 可派生为 "economize"，意为“节约”。将 "economize" 填入后，句子完整且符合语法规则：
"They are operating the factory with very small material supplies, so they have to economize wherever they can."
答案：economize
解析
本题考查词词形转换，核心是根据句子语境和语法要求，将名词"economy"转化为合适的动词形式。句子前半部分提到"他们用非常少的材料供应经营工厂"，后半部分"so"表示因果关系，需要一个动词作谓语，说明因此必须采取的行动。"economy"的动词形式是"economize"，意为"节约；节省"，填入后句子后，语义通顺且符合语法（have to后接动词原形）。