Hello!I ____you____in London.How long have you been here?
问题描述:
Hello!I ____you____in London.How long have you been here?
A.don't know;were
B.hadn't know; are
C.haven't known;are
D.didn't know;were
答
D.didn't know;were
指之前不知道,现在当然知道了
后面were是要与did保持一致