(将下列句子改为含有宾语从句的主从复合句) Has he finished his homework? His mother asked．

　　His mother asked ______ he ______ finished his homework．

(将下列句子改为含有宾语从句的主从复合句) He should work hard．He knew．

　　He knew ______ he _______ work hard．

(将下列句子改为含有宾语从句的主从复合句) What has he said? Do you know?

　　Do you know _____ he ______ said?

(将下列句子改为含有宾语从句的主从复合句) Will we visit the Great Wall? I want to know．

　　I want to know ______ we _____ visit the Great Wall．

(将下列句子改为含有宾语从句的主从复合句) The earth goes around the sun．The teacher said．

　　The teacher said ______ the earth ______ around the sun．