Hangzhou is the most beautiful city () I have been to

问题描述:

Hangzhou is the most beautiful city () I have been to
that B where C which
选什么,为什么

选【A that】
3.先行词被序数词或形容词*修饰时.如:
(5)This is the most beautiful city that I've ever seen.
这是我见过的最漂亮的城市.лл���ɣ�