-Your colleague`s spoken English is beautiful,Lily.-It`s no

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-Your colleague`s spoken English is beautiful,Lily.-It`s no wonder.She_in the USA for a year
as a visiting professor.
A.worked B.has worked C.had worked D.has been working
选择A 为什么不选B或C

A表示她曾做过一年的导游,与现在做什么无关
B、D表示她到现在为止已经做了一年的导游,现在还在做；但第一句说明她已经不做导游了（是我的同事）,所以不对
C过去完成时要和过去时比较,这里没有过去的时间点去比较,语法不通
再问：那什么时候 for +一段时间用完成时啊
再答：根据上下文来判断命题人给出第一个句子不是没有原因的本题是一经典考点一般来说for + a period of time都是完成时这是特例

-Your colleague`s spoken English is beautiful,Lily.-It`s no your colleague's spoken English is quite good,Amy.No wonder, -----Lily \,when is your mother's birthday -----It's on the 单选填空答案和解析Whose camera is this?Is it Lily's?No,it's n is your camera like Bill's or Ann's No.but it's almost the s is this your bicycle,david?no,it's not _____.it's helen's. ( ) (Is) that (your shirt?) No,it's (Mike.)快 ---Is your stomach ache getting _____?-----No,it's worse. Is Lianhua Supermarket near your home?--------No.It's far___ -Is your shirt g （）? -no it's blue. Is this your bike No ,it's ________(Li Lei ) is this your book?no,it's 什么.（提示he)