School ka bara ma English ma like ka

This is Mahender before you. Is this correct?

my major is

in conversation, "Hello, nice to meet you. Could you spare for a moment?" is this a correct way to say?

how did your car break down

when we use of sentence that you are my life saver?

in conversation, " Hello, it was nice talking to you. can we be in touch in future?" is this a correct way to say?

Guess the answer I have a neck ,but no head ,who am I?

when we can say don't mention it..?

Irregular past ko simple past bhi bolte hain?