What do1 I need do2 if3 I want to be4 a famous man?
问题描述：
What do1 I need do2 if3 I want to be4 a famous man?
1 2 3 4 哪个单词用错了?怎么改正?1:do 2:do 3:if 4:to be
答
2错了,是 to do 才对