单项选择题

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.
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单项选择题
We learn from the first paragraph that ______.
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
单项选择题
A．Because all the people can enter it at any time.B．Because it opens fulltime all day.C．Because all its students are mother of families.D．Because students don’’t have to pass entrance examinations.
A．Because all the people can enter it at any time.
B．Because it opens fulltime all day.
C．Because all its students are mother of families.
D．Because students don’’t have to pass entrance examinations.
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