请帮我解决英语!宾语从句：选择正确答案,并把句子译成汉语2、I want to know how long_______

请帮我解决英语!
宾语从句：选择正确答案,并把句子译成汉语
2、I want to know how long_______.(C)
A．has he been back B．has he come back
C．he has been back D．he has come back
3、Do you know_______?()
A．what the news are B．what is the news
C．what the news is D．what are the news
4、He will write to you as soon as he _______to Shanghai.()
A．gets B．is getting C．will get D．shall get
5、I liked sports_______I was young.()
A．so much as B．so much that
C．very much when D．very much because
6、_______ mother got home,I was tidying my room.
A．After B．When C．As soon as D．Before
7、If it_______tomorrow,we'll go to the Great wall.
A．doesn't rain B．won't rain C．not rains D．isn't rain
8、The teacher says_______she will leave a message on the headmaster's desk.
A．if B．who C．that D．what
9、I thought he_______to see his mother if he time.
A．will go…has B．will go …will have
C．would go …would have D．would go …had