Question

Mathematics ......my favorite subject when I was at school
a. was b.is c.are d. were

Answer 1

Answer: A. was

Explanation: the sentence says "when i was in school" which means he/she is no longer in school so its not "B. is" and "C. are" and "D. were" does not make sence.

Hope this helps :)

Answer 2

the answer to your question is a. was.