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