.  The committee ______ over the problem among themselves for two hours.A.has ar

.  The committee ______ over the problem among themselves for two hours.A.has ar

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.  The committee ______ over the problem among themselves for two hours.
A.has arguedB.has been arguingC.have arguedD.have been arguing

答案
D
解析

举一反三

. The Smiths ______ their breakfast when the morning post came.
A.hadB.has been havingC.are havingD.were having

题型:不详难度:| 查看答案

. No one except two students ______ the meeting.
A.has been late forB.have been late forC.was late forD.were later for

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. The president, accompanied by his assistants, ______.
A.have arrivedB.are arrivingC.had arrivedD.has arrived

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. A number of cars ______ in front of the park
A.is parkedB.was parkedC.are parkedD.has parked

题型:不详难度:| 查看答案

.  The majority of the damage ______ easy to repair.
A.isB.areC.wereD.Be

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