Ответ:

1 I'll be happy if I get a good mark.

2 It it rains all weekend, we won't go for a walk.

3 If I forget my best friend's birthday, she will be upset.

4 I'll pass my exams, if I study hard.

5 If I don't feel well tomorrow morning, I won't go to school.

6 I' ll go to bed early, if I am tired.

7 I'll be disappointed, if pizza is delivered late.

Объяснение: