A new stadium ___ at present in our city.Work on it ___ in another two months.

A, is built, will complete   B. is being built, will complete   C. is being built, will be completed D. is building, will be completed

实验室中，常用天平来测量物体的_______ ，测量时应将________ 放在天平的右盘内( 选填“被测物”或“砝码”) 。在“用电流表测电流”的实验中，电流表应该________在被测电路中（选填“串联”或“并联”），电流表的“+”接线柱接在电路中靠近电源________极的一端。