________ nearly all behavior is learned behavior is a basic assumption ________ has been put forward by social scientists.
A．What; that B．That; what
C．What; what D．That; that
The British are not so familiar with different cultures and other ways of doing things, ________ is often the case in other countries.
A．that B．who
C．where D．as
________ some students are not aware of is ________ difficult life can be if they are not devoted to study.
A．That; how B．Which; what
C．What; what D．What; how
________ you are supposed to do ________ you don't like a thing is change it. Don't complain.
A．That; why B．What; when
C．What; where D．That; how
His younger sister may already be in high school now, in ________ case this picture book is too childish for her.
A．that B．which
C．whose D．what
It is by no means clear ________ the president can do something to end the strike.
A．whether B．which
C．that D．what
