问题补充:
— Have you ever visited the Opera House?
—Yes.When I was in Sydney, I it twice.
A. have visited
B. had visited
C. visited
D. would visit
答案:
A. have visited
B. had visited
(答案→)C. visited
D. would visit
解析:
这题考查时态题:因为时间是When I was in Sydney,所以用过去时,句意是:--你参观过歌剧院吗?--是,当我在悉尼的时候,我去过两次。选C。