Answer:
a: to learn
Explanation:
Infinitive is the basic form of a verb, without an inflection binding it to a particular subject or tense. The infinitive is often used with 'to' in front of it.
Answer:
1- Must
2-Must not
3-Dont have to
4-Should
5-can
6-should
7-Might
8-There is an error in the sentence.
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I Believe it is C, Noun clause
1. everyday I study at the library, which is down the street, for a few hours
