B. to depend only on food for their vitamins

　　C. not to take any vitamins together with medicines

　　D. to consult doctors before taking vitamin supplements

　　7. For people who lack Vitamin B-twelve, they can eat more from _______.

　　A. sweet potatoes

　　B. green leafy vegetables

　　C. pork products

　　D. eggs

　　C

　　Dear editor,

　　You can find language pollution whenever you open a newspaper or turn on your TV set, listen to a popular song at various advertisements. Language pollution exists almost everywhere and can be seen in the following places:

　　1. Chinese characters are written in the complex (复杂的 ) form. Although simplified（简化的） Chinese characters were accepted for use many years ago, it seems that more and more people like Chinese characters written in the complex form.

　　2. Many goods are produced in China but carry foreign names, which sound strange and have no meaning at all.

　　3. Words and expressions being used have a bad meaning. "Ba"(霸), which means bully in Chinese, is one example. Now there are a lot of goods, restaurants, even factories or firms, with "Ba" in their names.

　　4. There are too many incorrect grammatical expressions. Some films have strange names and incorrect grammatical structures. "Ai ni mei shang liang', which means "I love you without consulting", is grammatically incorrect and this kind of expression is now becoming popular.

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