36. My mother taught me to do ________and subtraction. A. addiction B. addition C. adoption D. adjustment 37. It is ________of Beijing to have such hot weather in July. A. tropical B. typical C. trial D. tradition 38. The company offers a great ________of services to students. A. variety B. vary C. various D. variously 39. My older brothers are 22, 20, and 18 years old________. A. together B. respectively C. reliably D. order 40. Nancy.s father ________her that he would stop drinking. A. promised B. said C. deceived D. requested
