阅读下面短文，掌握其大意，然后从1－15各题所给的A、B、C和D项中，选出最佳选项。
On Thursday afternoon Mrs Clarke locked the door and went to the women`s club as usual. It was a pleasant way of passing time for an old woman who lived 1____
When she came home she sensed something 2____ . Had someone got in? The back door and the windows were all locked and there was no 3____ of forced entry (进入). Had anything been taken? She went from room to room, checking , and found her camera and spare watch missing.
The following Thursday she went out at her usual time, but didn`t go to the club. 4___ , she took a short walk in a park nearby and came home, letting herself in through the back door. She settled down to wait and see what would 5____
It was 4 o'clock when the front doorbell rang. Mrs Clarke was 6____ tea at the time. The bell rang again, and 7____she heard her letter box being pushed open .8____the kettle (壶) of boiling water, she moved quietly towards the door. A piece of wire appeared through the letterbox, and then a 9____ . The wire turned and caught around the knob (圆形旋钮) on the doorlock. Mrs Clarke raised the kettle and poured the water over the hand. 10____was heard outside as the 11____ fell to the floor and the hand was pulled back, which was 12____ by the sound of running feet.
It wasn`t long 13____ the police caught the thief. And Mrs Clarke was greatly 14____ at the club for her successful 15____ .