English grammar question 1.The number of our students __has__ grown rapidly since 1980. 2.Almost two-thirds of the land on this country __is__ unsuitable for farming. 3.One of the advantages of living near school __is__ the facilities and cafeteria available on campus. I was told that for question 1, "The number" is the subject and is viewed as singular, that's why the verb for that sentence is "is". The verb for Question 3 works fine by the same token. But for question 2, I am stucked. Can someone tell me what is the subject of question 2 ? Thank you so much.Thank you for those who kindly answered my question. I had typos and thank you for correcting them.

English grammar 1.It feels good to hang out with friends. 2.I feel good to hang out with friends. 3.I feel good hanging out with friends. 4.It is good to hang out with friends. 5.It makes me feel good to hang out with friends. Which one is better? Are they the same? Thank you.

English Grammar "It feels good to hang out with friends." Is the above sentence has any grammatical mistakes? -------------------------------------------------------------------------------------------- 1.It feels good to hang out with friends. 2.I feel good to hang out with friends. 3.I feel good hanging out with friends. 4.It is good to hang out with friends. 5.It makes me feel good to hang out with friends. Which one is better? Are they the same? Thank you.