第16题: [单项选择]There are still many problems ahead of us, but fortunately we can see the light at the end of the ______ by the terrific feedback I got from the market this time. A. campaign B. day C. tunnel D. road 参考答案:C 答案解析:at the end of the tunnel 固定用法,如He thought of his retirement day as the light at the end of the tunne