题目

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。 When you are traveling, whether on business or for pleasure, you often need to stay in a hotel. There are small hotels with very few services, where the prices are low, or there are large hotels with all the very latest comforts, where you could spend all the money you have in the bank for one very comfortable night.  Some want to live, rather than just stay, in a hotel; the hotels which are designed to meet their needs are called residential(居住的) hotels.   si人生活在光的世界里，伴随着“影”的存在．“人影相随”中的“影”是光在空气中________形成的．人在水中的“倒影”是指光在水面的________形成的．看“电影”中的“影”是光通过放映机________形成的．