45. be classified as 　　　

43. in the case of 44. slide into

42. be referred to as　　　

40. side effects 41. have trouble (in) doing sth　　　

39. have a different effect on

37. take illegal drugs 38. for the first time　　　

36. end in　　　

34. react to 35. warn sb of sth　

32. letter by letter 33. grab/capture one’s attention　　

30. in public 31. be short for　　　 in that