Teachers are some of the most important professionals in the world. They are responsible_____（21）preparing future generations to become productive and honest citizens, who will_____（22）to society for the whole of their adult life.
Obviously, the most common reason_____（23）teachers decide to teach is the ability to make a difference. There are many professions that give people the ability to have a(n) _____（24）impact on the world and change people's lives, _____（25）few professions have a direct impact on_____（26）a better society as teachers do. People tend to_____（27）their teachers for years after they finish school, for good teachers can_____（28）their students to become something that they_____（29）thought they could be, or to work_____（30）a field that they thought they did not_____（31）.
Teachers are also important because they provide_____（32）for their students. In certain low-income areas_____（33）some students may not have both of their parents _____（34）, teachers can provide an important influence that helps their students make the right_____（35）, even when they are not in the classroom. Generally, teachers' impact on students can last all through their life.
24._____
A、firm
B、positive
C、definite
D、absolute
【正确答案】：B
【题目解析】：形容词辨析。本句句意：有很多职业让人们有能力对世界产生积极的影响，改变人们的生活。firm意为“坚定的”，positive意为“积极的”，definite意为“明确的”，absolute意为“绝对的”。根据句意，故选B。
