判斷下列打引號的部分在句子中作什么成分
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判斷下列打引號的部分在句子中作什么成分.
1.It is not easy “to enter a famous university”.
2.He hopes to “to enter a famous university”.
3.He works hard “to enter a famous university”.
4.He wants his son “to enter a famous university”.
5.He is the boy “to enter a famous university”.