What is the Mona Lisa mentioned in the news made of?
A. Wooden squares
B. Plastic puzzle squares
C. Painted
D. Glass Mosaic
Read paragraph 10 to 13, and fill the blanks.
Morrie thinks people cann't get satisfaction from those things, "those " refers to _____ ? (用字母填空)
Morrie thinks people can really get satisfaction by ________.