维生素B2主要来源于（）。 A.水果 B.奶类 C.蔬菜类 D.动物内脏 E.调味品

选词填空，根据文章内容，选用所给单词的适当形式填空。其中有两个是多余的。

they，be，tell，luck，slow，say，order，come，take，put，he，watch

A little old man and his wife walked 小题1: into McDonald’s on one cold winter evening. They took a table near the back wall, and then the little old man walked to the cashier(收银处) 小题2: food. After a while, he got the food back.
There 小题3: one hamburger, some French fries and one drink. The little old man carefully divided the hamburger in half and the French fries into two piles. Then he neatly    小题4: the half of the food in front of his wife. Both he and 小题5: wife took a sip(一小口) of the drink. “How poor the old couple was!” the people around them might think. As the old man started to eat his hamburger and his French fries, his wife sat there  小题6:  him. They took turns to drink. A young man  小题7: over and offered to buy another meal for  小题8:. But they refused politely and said they got used to sharing(分享) everything.
Then a young lady asked the wife. “Excuse me, Madam. Why aren’t you eating? You   小题9:  that you shared everything. Then, could you 小题10: me what you are waiting for?” She answered in a smile, “The teeth.”