题目

语法填空We have studied in high schoolfor several months. When I first (go) into the school and saw mynew classroom and teachers, I thought I would have a new start. The school lifeis very busy and (excite). There are many activities in ourschool. We all take part in them (active). I have made many newfriends and we often help and learn from each other in study. Our (teacher) have taught us a lot. They not only teach us how to study but alsoteach us how to be useful person in society. They also tell us is worth doing.People often say, Thereis no rule of learning. Now I feel it is true. 若函数y=mx2+mx+m-2的值恒为负数，则m取值范围是（ ）A．m＜0或m＞B．m＜0C．m≤0D．m＞