... sth, or that give evidence or proof of sth: Observance (n) [U, sing.] the practice of obeying a law, celebrating a festival or behaving according to a particular custom: Ex: observance of the law ... house now was a very smart one (A) your (B) you (C) yourself (D) yours 116 Before investing in a new drug, we carry out an extensive if there is a need for one (A) investigation (B) investing (C) ... the part of all employees that a company will prosper (A) collaboration (B) collaborative (C) collaborator (D) collaboratively Collaborative (adj.) [only before noun] (formal) involving, or done...