Background背景材料
The twins, Justin and Luke, were athome.
Their friend Sarah lived in Hill Building.The twins received a message from
Sarah, who was asking for help.·There were some burglars in Hill Building.

Justin and Luke called the police at once.Then they ran there quickly.
The twins saw three men in policeuniforms coming out of the buildingwith guns in their hands.
The twins were pushed into a minibus.·They tried to use a knife to open theback door of the minibus.

1. Who was the story about?
The twins, Justin and Luke.2. Who lived in Hill Building?
Their friend Sarah.
3. Why did Sarah send a message to the twins?
She was asking for help. There weresome burglars in Hill Building.