题目内容

15、Since the baby milk powder was found to be polluted, there has been universal doubt _____ other food products are safe to eat. 

A. whether             B. that                C. what             D. how

试题答案

15、A.

解析: 考查名词性从句.在 doubt 后面带有同位语从句, 因含有“是否”之意, 故应填whether。

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