1、Bill is much better than I________

问题描述:

1、Bill is much better than I________
A、to swim B.in swimming C.at swimming D.on swim
2、---Have you seen the movie TITANIC,Rik?It's very interesting.
---Yes,I______it when I wad in New York.
A.have seen B.saw C.was seeing D.had seen
(1题我选B,2题我选A,都错了,请简单讲讲)

第一句抽出主干 就是Be good at doing sth
只不过是把good 变成了比较级
第二句在New York 是一个时间点 have seen 表达的是一个时间段