题目

初中英语完形一道小问题.
Mr.Robinson had to travel somewhere on business,and as he was in a hurry,he decided to go by air.He liked sitting beside a window when he was flying,so when he got on to the plane,he looked for a window seat.He found all of them had already had been taken except for one.There was a soldier sitting in the seat beside this one,and Mr.Robinson was surprised that he had not taken the one by the window；but,anyhow,he at once went towards it.
　　When he reached it,however,he saw that there was a notice on it.It was written in ink and said,“This seat is preserved for proper load balance,thank you.” Mr Robinson had never seen such an unusual notice in a plane before,but he thought that the plane must be carrying something particularly heavy in it,so he walked on and found another empty seat,not beside a window,【to sit in.】
　　Two or three people tried to sit in the window seat beside the soldier,but they too read the notice and went on,when the plane was nearly full,a ver

提问时间：2020-10-31

答案

其实逗号中间是插入语,放不放逗号不影响句子
选择A sit是不及物动词是不用于被动语态的 淘汰BD,on是介词 后面应该加宾语,但是后面已经没有宾语了,所以只能选择A了