Question

З питання
Can I borrow your pen? A) It's more formal express. A) 5) It's more polite express. B) It's more polite express. I) It's informal express.
4 питання
... we ... swimming in the sea if we to the beach tomorrow? (It might happen in the future)​. A) Will, go, go. Б) Could, go, go. В) Do, go, 'll go. Г) Would, go, go ​

Answer 1

Привет! Для первого вопроса:

Can I borrow your pen? B) It’s more polite express.

Для второго вопроса:

… we … swimming in the sea if we go to the beach tomorrow? (It might happen in the future). A) Will, go, go.

Таким образом, ответы: B) и A).
☺️