现在我们将做一批练习，在练习的过程中你需要键入代码，并且让它们运行起来。我不会解释太多，因为这节的内容都是以前熟悉过的。这节练习的目的是巩固你学到的东西。我们几个练习后再见。不要跳过这些习题。不要复制粘贴！
print("Mary had a little lamb.")
print ("Its fleece was white as %s." % 'snow')
print ("And everywhere that Mary went.")
print ("."* 10 )# what'd that do?
end1 = "C"
end2 = "h"
end3 = "e"
end4 = "e"
end5 = "s"
end6 = "e"
end7 = "B"
end8 = "u"
end9 = "r"
end10 = "g"
end11 = "e"
end12 = "r"
print (end1 + end2 + end3 + end4 + end5 + end6,)
print (end7 + end8 + end9 + end10 + end11 + end12)
Mary had a little lamb.
Its fleece was white as snow.
And everywhere that Mary went.
..........
Cheese
Burger
