单项选择题

I ______ the Summer Palace before, but I decided to visit it a second time.

A．have visited
B．visited
C．hadn't visited
D．had visited
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单项选择题
More than ______ years ago, there was a war between the two countries.
A．three thousand
B．three thousands
C．three thousand of
D．three thousands of
单项选择题
— Hi, haven't seen you for ages! You look fine! — ______. You look well, too.
A．Great
B．Oh, no
C．Thanks
D．Not at all
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