第19题: [单项选择]First designated in 1970, Earth Day has become an annual international event ______ concerns about environmental issues such as pollution. A. dedicated to raising B. dedicated raising C. dedicated to raise D. that dedicates to raising 参考答案:A 答案解析:dedicated to表示“把……奉献给”,“把……用在”,这里的to是一个介词,后跟-ing形式。