Although originally a German innovation, kindergarten got its real start in the United States as a movement to provide an improved learning environment for children.()

单项选择题Before the invention of photoengraving,steel and copperplate engraving served as the principal means of reproducing illustrations.

单项选择题The problem in America that the author is talking about in this passage is large amounts of food are lost in American().

A. Right
B. Wrong
C. Not mentioned