______he always thinks of is ______ he can do more for the country．

A．What; how 　                             B．What; what

C．That; that 　                               D．How; how

_________ you can succeed in the end will mainly depend on ______ you do and ________ you do it.

[    ] 　　

A. What; what; now    B. Whether; what; how 　　

C. Whether; how; why  D. That; whether; how

______ some teenagers don’t realize is _______ difficult life can be after they get addicted to drugs.

A. What,what a　 B. What, how　 　　 C. That,how　 D. That,what

______ some teenagers don’t realize is _______ difficult life can be after they get

　 addicted to drugs.

　　 A. What?what a　 B. What? how　 　　 C. That?how　 D. That?what