Audrey devoted all her time she had helped/ to helping others 哪个答_英语解答

Audrey devoted all her time she had helped/ to helping others 哪个答案准确,为什么?
上述有4个选项：A.to help B.helped C.to helping D.in helping

人气：492 ℃　时间：2019-08-20 12:42:57

解答

选C,首先devote to 是固定搭配,其次to是介词,后面跟动词ing形式