A．He can’’t find his office key.
B．He has misplaced some exams.
C．He is unable to talk.
D．He doesn’’t like his classroom.

A．too much publicity can harm the chances for the success of a new food innovation
B．innovations that produce culturally acceptable crops will generally be successful
C．a food-product innovation can be technically feasible and still not be economically feasible
D．it is difficult to decide whether a food-product innovation has actually been a success