Nowadays scientists are working hard to find out ______ to do with air pollution - 初中英语试题 - 超级试练试题库

题目

题型：不详难度：来源：

Nowadays scientists are working hard to find out ______ to do with air pollution.

A．how

B．why

C．when

D．what

答案

解析

试题分析：句意：现在科学家们正在努力找出做什么可以解决空气污染问题。how 怎么； why为什么； when何时； what什么。所以选D。

核心考点

试题【Nowadays scientists are working hard to find out ______ to do with air pollution】；主要考察你对助动词等知识点的理解。[详细]

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