The first thing we did in London was to London Tower Bridge.A、to go B、going C、go D、to have gone为什么?

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ThefirstthingwedidinLondonwastoLondonTowerBridge.A、togoB、goingC、goD、tohavegone为什么?Thefirstthingwedid

The first thing we did in London was to London Tower Bridge.A、to go B、going C、go D、to have gone为什么?
The first thing we did in London was to London Tower Bridge.
A、to go B、going C、go D、to have gone
为什么?

The first thing we did in London was to London Tower Bridge.A、to go B、going C、go D、to have gone为什么?
你想选A或者B吧,之所以用动词原型而不是不定式或者动名词是因为主语The first thing 有定语we did修饰.凡是定语里有sb did 或者是do,表语都用原型.举个例子:The work I will do today is type a document.明白?

这里要填一个名词性质的东西。。
我们知道,不定式和动名词都可以当名词用。
to即是不定式的标志。。
如果这里没有to 则应选 B。动名词。。。

你分析句子结构就可以了,
The first thing was go to Tower Bridge.
we did 是修饰THE FIRST THING这个主语
其实你做选择题只要提成分就可以了.

do是在这里是实义动词,当“做”讲时后面的动词用原形