C．Her job as a cook.

　　D．Her coworkers' packed lunch.

　　D　[推理判断题。根据第一段的"I always felt embarrassed when I saw my coworkers with their cute containers filled with fresh food that looked much more delicious than whatever I had grabbed out of necessity."可知，作者虽然有自备午餐的打算，但是一直没有付诸实践，是同事自备的午餐影响了作者。]

　　2．What is the key to the author's success in her habit change?

　　A．Her determined spirit.

　　B．Her doctor's suggestion.

　　C．Her perfect cooking skills.

　　D．Her coworkers' encouragement.

　　A　[推理判断题。根据第三段的"At first，the idea of packing my lunch felt like a sacrifice (牺牲)，but since I started bringing healthy food to my office，I have not looked back."可知，作者十分坚决地坚持自备午餐。]

　　3．The author made it her practice to .

　　A．stop eating fatty foods

　　B．have a snack after lunch

　　C．make a light lunch every day

　　D．prepare a salad and a sandwich for lunch

　　C　[推理判断题。根据第四段的"Eating a cleaner and lighter lunch not only supports my general weight­loss goals，but also makes space for the occasional weeknight dinner that I can enjoy freely."可知，作者坚持煮清淡食物作为午餐。]

　　4．What can be inferred from the last paragraph?

　　A．The author had no idea about the cost of her lunches.

　　B．The author used to work in downtown San Francisco.

　　C．Money spent on packed lunch was less than expected.

D．It's hard to find fresh food in downtown San Francisco.