41. Accuse sb of sth.

　　42. Charge sb with sth.

　　43. Be innocent of sth.

　　44. Be alert to sth

　　45. play a role/part in sth./doing sth

　　46. be worth doing sth

　　47. be worthy of doing sth

　　48. keep/lose contact with sb.

　　49. be second to none（首）

　　50. not to speak of/not to mention/let alone+名词/代词/动名词

　　51. delay/ mind/ admit/ avoid/ anticipate/ consider/ contemplate/deny/ dislike/ fancy/ finish/ involve/ permit/ practice/ quit/ risk+doing

　　52. adapt oneself to…