1.The key to ________ the problem is to meet the demands ________ by the customers.
A. solving; making B. solving; made C. solve; making D. solve; made
【答案】B
【解析】
【详解】考查非谓语动词。句意：解决问题的关键是满足顾客的需求。the key to中的to是介词，接动名词作宾语；demands与make之间是逻辑上的动宾关系，表示被动，用过去分词作后置定语，故B项正确。
2.One of the meteor (陨石) pieces was found to have crashed into a frozen lake, ________ a six-meter wide hole.
A. left B. leaving C. to leave D. having left
【答案】B
【解析】
【详解】考查非谓语动词。句意：其中一颗陨石碎片被发现坠入冰冻的湖中，留下一个6米宽的洞。One of the meteor pieces与leave之间是主动关系，此处用现在分词作结果状语，表示一种自然而然的结果，故B项正确。
