Hello! I ________ you _______ in London. How long have you been here?
A．don’t know, wereB．hadn’t known ,are
C．haven’t known ,areD．didn’t know, were
D
考查時態(tài).根據(jù)下文你在這兒多久了?可知前文意思是我不知道你在倫敦.說的是在這以前我不知道你在倫敦,主從句都是強調(diào)的過去,故選D.
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