写出下列各句的同义句。
1. Li Ming and his parents had a good time in Shanghai last summer.
Li Ming and his parents _______ _______ in Shanghai last summer.
2. Linda is old enough to look after herself.
Linda is old enough to _______ _______ of herself.
3. You mustn't feed the animals in the zoo.
_______ _______ the animals in the zoo.
4. The black printer is cheaper than the other printers in the shop.
The black printer is _______ _______ of all the printers in the shop.
5. Last week, I got a letter from a friend of mine.
Last week, I _______ _______ a friend of mine.