Question

【题目】—What do you think it is that has contributed to his huge success?

—________ he keeps focused on what he is doing.

A. Because B. How C. Whether D. That

Answer 1

【答案】D

【解析】考查名词性从句。句意：——你认为他巨大成功的原因是什么？——他专注于所做的事情。he keeps focused on what he is doing是他成功的原因，这是个意思完整、成分完整的句子，回答上面问题的答语，需要一个引导词来引导这个句子，that引导句子不作成分，无意义，只起引导作用，故选D项。What引导从句在句中要作成分。Because状语从句排除。B项How和C项Whether都可以接名词性从句，但句意不符可知That无实在意义，引导主语从句做主语。