Temat: poprawność zdań

czy zdania zostały dobrze zmienione :
We bought more wine than was necessary
We(didn't had to buy so) much wine.
I didn't finish reading the book until after midnight.
It (was after midnight when I )finished reading the book
The actress put on veil because she didn't want to be recognished.
The actress put on veil to (being unrecognisable )