, у меня мозгов как у листочка Я НЕ ПОНИМАЮ °
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1.-She has …… money today. He can buy a book.
2.-They often drink ……. Coke. It is bad for their health.
3.-He invited ……. friends on his birthday party.

1.-She has much // enough  money today. She can buy a book.

2.-They often drink much  // too much Coke. It is bad for their health.

3.-He invited many friends to  his birthday party.

Думаю, это на much // many задание.

1) в первом заменено he --> she. По смыслу не подходит he.

3) invite smb to a party --> исправлено вместо on