when I set to work with the scientist后面这个从句已经是过去时.
那前面的句子就应该是过去的过去.
选C.
A是虚拟的语气.我应该在那里超过一个星期.说不通
D是将来.我将来在那里超过一个星期.还是不通
选C就是.我开始跟随科学家一起工作的时候.我已经在那里工作超过一个星期
【进行时与完成时】.I ______ there little more than a week when I set
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