Question

3) i study english at shool,4) i (go)to college in the USA​

Answer 1

I go to college in the USA

....

Answer 2

I go to college in the USA

Answer 3

It seems like you provided two separate statements. If you're looking to combine these sentences, you can do so in the following way:

"I study English at school, and I go to college in the USA."

This creates a compound sentence by using the conjunction "and" to connect the two related actions.