把下面的句子合并成一个带有宾语从句的主从复合句.
1． Did Peter come here yesterdsy?Li Mei wants to know.Li Mei want to know 2．Where did she park her car?Do you know?Do you know 3．How can we get on the plane?I don’t know I don’t know 4．What was he doing there?Mother didn’t know Mother didn’t know 5．Where did you find the book?Could you tell me?Could you tell me