16. Vitamin C is an effective treatment for a cold 维生素C可以有效地治疗感冒。 Flu-sufferers are often encouraged to increase their dosage of Vitamin C, but most experts ha...
20. A) She didn't have enough sleep. B) She has caught a bad cold. C) She is dying from a serious disease. D) She is too nervous to feel at home. 21. A) She should take some medicine and more water. B) She should take care of her rest and drink ...
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