阅读下面短文，从短文后所给各题的四个选项（A、B、C和D）中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。

    Three men were caught in North China recently for killing four people in a HK $ 190 000 robbery in Shenzhen 10 years ago. The 1, Liu, Tian and Cao, were brought back to Shenzhen at the end of last month. They came to Shenzhen from their hometown of Changchun in Jilin in 2002, when they were 2 their twenties. Liu ran a beauty salon in Gangxia Village in Futian District,3 was losing money. Short of money, the three decided to 4 a neighboring store which dealt in currency exchange (货币兑换). On Sept. 25, 2004, the three, along with 5person, Gong, from Sichuan Province, went to the store 6 they wanted to exchange RMB into HK currency. They killed a woman and three men in the store, escaping to Shenzhen 7 HK $ 190 000. Shenzhen police began 8 them which remained fruitless for the following 10 years. But they were told last month that the suspects were probably 9 in Changchun. Changchun police caught Cao in a small village near his home. With 10 from Cao, police arrested Tian at a hospital where he was working as a doctor. Liu was arrested soon after.