题目

完形填空     先通读短文，掌握其大意，然后从A、B、C、D四个选项中选出一个可以填入相应空白处的最佳答案。     One summer evening as I was cooking dinner, there was a knock at the door. I  1   it to see a really bad-looking man. But his voice was  2 as he said,Good evening. I come to see if you have a room for just one night. I came for a treatment this morning from eastern shore,  3  there's no bus till next morning. He told me he had been hunting(寻找) but with no  4 . I told him we would find him a bed, but to rest on the porch下列有关于光的说法中不正确的是（ ）A.光在同种均匀介质中是沿直线传播的B.太阳和月亮都是光源C.日食、月食现象可以用光沿直线传播来解释D.我们先看到闪电，后听到雷声的原因是光速快于声速