_____ was obvious ______ the manager was waiting for LiFang to leave.

A. It, that                     B. This, that                          C. That, what                        D. What, that

______ is obvious ______he has finished his work.

    A. What; that      B. That; that         C. It; that           D. It; what

His obvious changes in character were ________ by a number of unfortunate incidents in life.

A．brought about　 　B．brought up

C．brought to D．brought away

_________ is obvious that they’ve made a terrible mistake.

A. What　　　　 B. It　　　　　 C. This　　　　　 D. That

______ is obvious that he doesn’t have the determination to work hard.

A. That 　　 B. This　 　　　 C. It 　 D. Which