—Hey, who’s that man over there? He us since we came in.
—The one by the door? I don’t know. He looks like a lawyer or something, not a journalist. Perhaps he here to look round, like us.
A. has watched；only came
B. is watching；had only e
C. has been watching；has only e
D. had been watching；came
网友回答
A. has watched；only came
B. is watching；had only e
(答案→)C. has been watching；has only e
D. had been watching；came
解析： 本题考查时态。since后接从句,谓语动词用一般过去时,主句动词用现在完成时或现在完成进行时。第二个空是描述的预先在有关的境况，故不用一般过去时。