1. I think we need to eat a balanced diet because junk food has a lot of fat, which is harmful............... our health. A. for B. win C. to D. by 2.While smoking and fast food consumption can increase the risk of obesity, doing regular................ activity can help people have a good shape A. mental B. physical C. daily D. extracurricular 3.The coronavirus is so............... that all citizens in this city contract it. A. Infection B. infected. C. cut into D. cut by 4, the last century's advances such as the discovery of ....... and vaccines have contributed to longer life A antibiotics B natural remedies C traditional therapies D acupressure