题目

I don’t often lose things and I’m especially careful with money,so I was quite surprised when I reached for my wallet and it wasn’t there.At first,thought it was possible that I could have left it home.Then I remembered taking it out to pay for the taxi,so I knew I had it with me just before I walked into the restaurant.I wondered if it was possible that it could have slipped out of my pocket while I was eating dinner.Thinking about that possibility,I turned and walked back to the table where I had been sitting.Unfortunately,there were several people C at the table at the time,so I called a waiter and explained to him that my wallet had fallen out of my pocket while I was sitting at the table a few minutes earlier.I had the waiter go over the table to see if my wallet was on the floor.While the waiter was looking for it,the manager of the restaurant came up to me and asked me if anything was wrong.I didn’t want to get a lot of people involved in the problem,but I knew I 16 to get a lot

提问时间：2020-10-19

答案

16、B 表示不得不 无可奈何
17、A what既做主句的宾语 又做从句的主语