将下列句子合并成宾语从句（每空一词）
He lost his umbrella. He doesn’t know ...
He doesn’t know ____ he ____ his umbrella.
答案
that,lost
知识点：宾语从句
He lost his umbrella.为陈述句，充当宾语从句时，连接词要用that，也可以省略。本题要求填入合适的连接词，所以答案为that。
略
WORD格式（
