We often go to the beach … summer. (какой предлог нужно вставить in, on, at.) i like to look at the stars … night.(in, on, at.)

We often go to the beach in summer. - Летом мы часто ходим на пляж.
I like to look at the stars at night. - Ночью мне нравится смотреть на звезды.

We ofen go to the beach in summer.
I like to look at the stars at night.