写出下列各句的同义句。（共5小题；每空一词各0.5分，满分5分）
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.