1. (2022·白银) 阅读以下四条谜语，根据其内容回答其后各个小题。

Riddle 1 I carry a big bag every day. There are letters and parcels in the bag. I take them to people. Who am I?	Riddle 2 I wear a uniform. I catch thieves. I make sure the neighbourhood is safe. Who am I?
Riddle 3 I work on a bus. I drive it around every day. I take people to different places. Who am I?	Riddle 4 I work in a shop. Many children come to the shop. They buy sweets and chocolate. Who am I?

1. （1） The underlined pronoun "them" in Riddle 1 refers to ________.

   A . big bags B . letters and parcels C . people D . riddles
3. （2） What is the answer of Riddle 2?

   A . A teacher. B . An engineer. C . A waiter. D . A policeman.
5. （3） Where does the person in Riddle 3 work?

   A . On a bus. B . In a zoo. C . At an airport. D . On a farm.
7. （4） The shop in Riddle 4 is probably a ________.

   A . book store B . fruit store C . fish market D . candy store
9. （5） The riddles are about ________.

   A . children B . parents C . jobs D . places