1.With his work completed,the businessman stepped back to hi

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1.With his work completed,the businessman stepped back to his seat,feeling pleased_______he was a man of action.
A.which B.that C.what D.whether
2.The tranditional view is______we sleep because our brain is "programmed" to make us do so.
A.when B.why C.whether D.that
还要详细解析每个选项
选b d
第一个是宾语从句
第二个是表语从句
解释每个选项

B,后面的he was a man of action是feeling pleased 的原因,用that引导原因状语从句
D.后面的整个句子都是traditional view的内容,用that引导表语从句

With his work completed ,the businessman stepped back to his [D36] With his work completed ,the businessman stepped back With his work completed,the manager stepped back to his seat Stepped on,I remember back to the step. Every time I stepped up to the plate ,I expected to get a hi The boy seated himself in the corner with his back()to his f He completed about half of his work. start with the item farthest back and work up to the present he stepped into the office, ____ down and began to work at o the student never completed his work in time .I don't know h With the work completed,he feel pleased ______he was a man o 名词性从句的!With the work completed,he feel pleased ______he was