1. There are a lot of clubs in my school.

2. There are a lot of clubs in our school.

(Are both correct? Can we use 'our' instead of 'in'?)

3. I study a lot of subjects like mechanics, ethics, and social studies.

4. I study a lot of subjects such as mechanics, ethics, and social studies.

5. I study such a lot of subject as mechanics, ethics, and social studies.

(Are they all grammatical and the same? What about #5? Is it grammatical?)

2 answers

Number 5 is Grammatical, Because of the "such".
ACK! I disagree with Brit. #5 is wrong. It should read:

I study a lot of subjects such as mechanics, ethics, and social studies. The other 4 look fine to me.