.Part I Choose the best answer to complete each blank. Please write down your answer in the answer sheet. (1)1 Dont worry. Either my colleague or I _ coming to help you.A. isB. areC. amD. will2 Economics _ an important study in modern society since the economics of any projects _ paid much attention to.A. are; areB. are; isC. is; isD. is; are3 A pair of pliers _ missing from my tool box, but my scissors _ still in the box.A. are; are
