Question

—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 come

C．has been watching；has only come

D．had been watching；came

Answer 1

C

 本題考查時(shí)態(tài)。since后接從句,謂語(yǔ)動(dòng)詞用一般過(guò)去時(shí),主句動(dòng)詞用現(xiàn)在完成時(shí)或現(xiàn)在完成進(jìn)行時(shí)。第二個(gè)空是描述的預(yù)先在有關(guān)的境況，故不用一般過(guò)去時(shí)。