31.Dr Bethune went on operating (throughout the nigh)A.day and nightB.in the eveningC.the whole nightD.all over the nightC和D有什么区别么

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31.Dr Bethune went on operating (throughout the nigh)
A.day and night
B.in the evening
C.the whole night
D.all over the night
C和D有什么区别么

A work B worked C to work D working D go on doing sth 继续做某事(固定搭配)