I'm in favor of English-speaking contests in schools. Such contests(1) _______ students to practice speaking English in their classes and help them improve their speaking skills. Besides, while(2)_____ themselves for the contests, students have a chance to review their lessons thoroughly. Contests among classes provide students with opportunities to wprk with team spirit, thus eabling them to learn how(3)_____ with other people. Some students may think that their preparations for the speaking contests are time-consuming. However, in my opinion, such preparations are worth spending time on. My classmates and I have found that we speak English better after each contest. In sum, English-speaking contest(4) _______ school are usful to students. 1. A. advise B. suggest C. invite D. encourage 2. A. to prepare B. preparing C. prepare D. was preparing 3. A. to exchange B. to speak C. to cooperarate D. to compete 4. A. at B. on C. about D. to