阅读下面短文，从短文后所给的A、B、C三个选项中选出能填入相应空白处的最佳选项。 Sara lived in a village with her mother. When Sara grew up, she was tired of boring （1） life. She wanted to go out. One morning, she secretly left while her mother was still （2） . Unluckily, the world outside was not as （3） as she had expected. Ten years later, Sara （4） home. It was midnight when she came back home. She saw weak light （5） the window. She knocked at the door softly but no one （6） . Then she tried opening the door and the door was easily opened. She Was （7） "How strange it is! Mum never （8） to lock the door in the past." At this time, Sara saw her mother sleeping （9） the cold floor. Sara couldn't help crying "Mum!". Hearing the sound, her mother opened eyes and saw her daughter. Sara complained, "Mum, （10） didn't you lock the door tonight? "The mother answered, "I am afraid you can't open the door if you return at night. I have not locked the door for ten years." From that day on, her mother began to lock the door again and slept with a smile.（1）A．cityB．villageC．town（2）A．sleepingB．walkingC．sitting（3）A．boringB．interestingC．helpful（4）A．returnedB．leftC．returned to（5）A．acrossB．inC．through（6）A．answeredB．closedC．said（7）A．happyB．excitedC．surprised（8）A．spokeB．toldC．forgot（9）A．inB．onC．with（10）A．whyB．whatC．how