— My son seldom has        breakfast.

— It is         unhealthy habit. You must ask him to change it.

A．/; an

B．the; an

C．/; a

D．the; a

20世纪30年代，国民政府的最大失误莫过于_______．

A．一直 * * 人民革命

B．改善与美英的关系

C．同日寇的四次大会战

D．实施“攘外必先安内”政策