OG17-697题，research作动词时的用法

ivivian

装渣渣 发表于 2017-9-1 15:23
在research用作动词，更多时候是表现为及物动词，直接加名词；但在少数情况下，具体到某个细分领域时，会加 ...

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zeze！

参考了下gamtclub上有人的解释，When "research" alone is used as a verb, no preposition should be used. eg. we should research books
When a verb such as as "do" or "conduct" is placed before the word "research" (which is then used as a noun), a preposition should be used. "On," "into," and "about" are all acceptable. eg. we conduct a research on behaviors of human

7MX

同问 我觉得e选项中的he也可能指代professor  就是想问什么时候才能算作指代，模糊呢？