Пожалуйста помогите,даю 40 баллов .Goin the sentences.Use if+ the Present

Пожалуйста помогите,даю 40 баллов .
Goin the sentences.Use if+ the Present Tense+will/can
Example:It might rain. If it does, we can stay at home. If it rains, we can stay at home. If it rains, we can stay at home.
a) My brother might fail his exam. But he can try it again.
b) We may miss the rain. But we can catch the next one.
c) Our team might lose the game. If we do? our trainer will be upset.
e)The children musth't go near Tom's dog. It'll bite them.