He stepped into the office, down and began to work at once. [ ] A. sitting B. to
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![He stepped into the office, down and began to work at once. [ ] A. sitting B. to](/pic/43_909948.jpg)
He stepped into the office, ________ down and began to work at once.
[]A.sitting
B.to sit
C.having sat
D.sat
试题答案
答案:D
解析:分析句子结构可知,空格部分在句中作并列谓语,故用sat。 |