阅读下列短文, 从每小题所给的A、B、C、D四个选项中选出一个最佳选项。

Mrs Smith is doing some shopping in a new shopping mall. She wants to buy a 1. She is 2 around. Now she is in a big 3 shop. She is 4 one of the sweaters in the shop. And there is a young man 5 near her. Mrs Smith wants to try 6 the sweater. So she asks the young man, "Excuse me, can you serve(招待) 7?I want a sweater." The young man is 8 and says, "I'm sorry. I can't serve you." Mrs Smith says, "Of course you can. That's your 9." The young man says, "It is not my job. I want a sweater too. "Mrs Smith feels very 10.