21. Choosing to go under the ___ is very risky. Women these days are very fond of this way of improving appearance. * 1 điểm A. surgery B. knife C. operation D. weather 22. You’re getting on my ______ by constantly bothering me like that! * 1 điểm A. muscles B. brains C. nerves D. blood 23. Persuading my father to drive me to school is very easy, like taking ____ from a baby. * 1 điểm A. candy B. sweets C. cake D. biscuits 24. An act of physical force that causes or is intended to cause harm is called ____. * 1 điểm A. family B. violence C. health D. marriage 25. When my father caught me with a cigarette, he made me smoke the entire pack. I was ___ as a dog and I've never touched a cigarette ever since. * 1 điểm A. sick B. sad C. stupid D. stubborn