It remains to be seen ________ the newly formed committee's policy can be put into practice.
A．that B．which
C．what D．whether
Helen has just heard the news from her father ________ her boyfriend David will come back soon.
A．when B．how
C．which D．that
_______ you said at the meeting describes a bright future for the company.
A．When B．How
C．What D．That
Time is of no importance to great thoughts, ________ are as fresh today as when they first passed through their authors' minds, ages ago.
A．what B．that
C．which D．where
Willpower is a kind of quality, ________ is ________ it takes to do anything well.
A．what; which B．what; what
C．which; which D．which; what
________ 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
