His brother graduated from Peking University in 1998 and ___ as a teacher in the west ever since.A.has worked B.worked C.is working Dhad worked为什么选A

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HisbrothergraduatedfromPekingUniversityin1998and___asateacherinthewesteversince.A.hasworkedB.workedC

His brother graduated from Peking University in 1998 and ___ as a teacher in the west ever since.A.has worked B.worked C.is working Dhad worked为什么选A
His brother graduated from Peking University in 1998 and ___ as a teacher in the west ever since.
A.has worked B.worked C.is working Dhad worked
为什么选A

His brother graduated from Peking University in 1998 and ___ as a teacher in the west ever since.A.has worked B.worked C.is working Dhad worked为什么选A
ever since 表示从过去以来一直是老师.因此用has worked现在完成时