21.Here is a picture of Lei Feng ____ we learned a lot.

　　22.I have a lot of magazines,most ____ are about the English knowledge.

　　23.Can you see the speaker ____ comes the voice,“Can I help you?”

　　24.The manager ____ a group of Young Pioneers are sitting is famous across China.

　　25.I will never forget the days ____ we worked together in a foreign country.

　　26.There is a tree ____ a group of League members often play chess.

　　27.Nearby were two boats ____ they had come to the lonely island.

　　28.The aeroplane ____ she was traveling was delayed for three hours at least.

　　29.The speed ____ Tom drives his car is too high.

　　30.He had 30 pounds in his pocket ____ he was determined to buy his son a gift.