Изберите правильную форму глагола: 1 If you___hard, you will get excellent

Выберите правильную форму глагола:
1 If you___hard, you will get excellent marks. A) study
B) will study
C) have studied
2 I would help you, if I ___time.
A) had had
B) had
С) have
3 If I___enough money, I would have visited Moscow.
A) will have
B) had had
С) had
4 I would understand him, if I___you.
A) be
B) will be
С) were
5 If she___this dress, she would buy it.
A) will like
B) likes
С) liked