Jim gave me a letter to post,I…forget to post it.A mustn'tB shoul_英语解答

Jim gave me a letter to post,I…forget to post it.
A mustn't
B should
C could
E must

人气：289 ℃　时间：2020-05-28 18:36:24

解答

选项没打全吧?应该是couldn't选B这里指竟然的意思意思是：吉姆让我寄信，我竟然忘了。couldn't 是错的，我才没写B啊不是说了啊