1) are
Объяснение:
Сочетание "in case" присоединяет придаточное условия, а в условных придаточных нельзя использовать будущее, как в главном.
On Monday we had five lessons. The first lesson was Russian. At that lesson we wrote a dictation and did some exercises. Nick went to the blackboard. He answered well and got a "five". Pete did not get a "five" because he did not know his lesson. After the second lesson I went to the canteen. I ate a sandwich and drank a cup of tea. I did not drink milk. After school I did not go home at once. I went to the library and changed my books. Then I went home.
Объяснение:
В Past Simple к правильным глаголам добавляется окончание -ed (например, answered, changed), а неправильные глаголы ставятся во вторую форму (например, have -> had, write -> wrote).
We'll ring them before we go in case they are busy