题目

__________the right decisions__________the future is probably the most important thing we’ll ever do in our lives. A.Making;concerned B.Make;concerning C.To make;concerned D.Making;concerning   答案：Dmaking the right decisions是主语；concerning是介词，意为“关于”。6．甲：乙=5：6    乙：丙=4：9    甲：丙=10：27．