【題目】—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

【答案】D

【解析】考查名詞性從句。句意：——你認(rèn)為他巨大成功的原因是什么？——他專注于所做的事情。he keeps focused on what he is doing是他成功的原因，這是個(gè)意思完整、成分完整的句子，回答上面問題的答語，需要一個(gè)引導(dǎo)詞來引導(dǎo)這個(gè)句子，that引導(dǎo)句子不作成分，無意義，只起引導(dǎo)作用，故選D項(xiàng)。What引導(dǎo)從句在句中要作成分。Because狀語從句排除。B項(xiàng)How和C項(xiàng)Whether都可以接名詞性從句，但句意不符可知That無實(shí)在意義，引導(dǎo)主語從句做主語。

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