The three men tried many times to sneak across the border into the neighbouring country, ______ by the police each time.[1999]
【正确答案】 C
【答案解析】解析:only to do(only to be done表被动)常出现在句末表示“不料竟会,没想到会”,作主句的结果状语。因此,本题应该选择C。