The doctor worked five hours a rest A.for;with B.on;without

The doctor worked five hours a rest A.for;with B.on;without C.about;having D.for;without
空是要填的单词

The doctor worked___ five hours___ a rest.
A.for; with B.on; without
C.about; having D.for; without
答案为B
从语法上说,动词+ for 一段时间后,需用完成时态；而本句用的是过去时；work on这个词组本身有“连续工作”之意,故选B.

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