[填空题]In dealing with students at the high school level that is, the second, the third and fourth year of high school-we must bear in mind that to some degree they are at a difficult psychological stage, generally called adolescence. Students at this level are likely to be {{U}} (S1) {{/U}} mentally, to be subject to involuntary distractions and romantic dreaminess. They are basically shy or {{U}} (S2) {{/U}}. They lack frankness and are usually very sensitive but hate to admit it. Fundamentally they want to be kept busy but they {{U}} (S3) {{/U}} to admit it. They are frequently the victims of earlier poor {{U}} (S4) {{/U}} , and this makes every effort doubly hard. They are usually willing to work, but they hate to work without {{U}} (S5) {{/U}} the results they think they should. Their critical faculties are beginning to develop and they are critical of their instructors and of the {{U}} (S6) {{/U}} they are given to learn. They are beginning to feel the pressure of time;