72. Supply the correct from of the infinitive or the gerund.1.

72. Supply the correct from of the infinitive or the gerund.
1. I used to ( walk) in the forest when I lived in the country.
2. I got used to ( walk ) in the forest very soon.
3. He used to ( study ) in the library last month.
4. He cant get used to ( study) in the library.
5. He is not used to ( study ) at all.
Помогите решить безотлагательно