问题补充：
It is the second time that I in Shanghai. What great changes! It’s years since I here last time.
A. went; had left
B. had been; left
C. have; had left
D. have been; left
答案：
A. went; had left
B. had been; left
C. have; had left
(答案→)D. have been; left
解析：考查时态。固定句式：it is/was 序数词time that从句；句意：这是某人第几次做某事的时候了。如果前面是Is，后面就使用现在完成时；如果前面是was后面就使用过去完成时。本题第一空前面的is，所以使用现在完成时。第二空it is/has been一段时间 since从句（过去时）；指自从…以来多长时间了。句意：这是我第二次来上海。变化真大啊！自从我上次来这里到现在已经有很长时间了。故D正确。
