改错1,I forgot my watch in my room this morning A forgot B my C in D this morning 2,见下

题目

改错1,I forgot my watch in my room this morning A forgot B my C in D this morning 2,见下
2,He was so tired that he fell fast sleep
A was Btired C fell D sleep
请热心网友选出句子中的错误后并说明理由,

答案