完成句子。 1. 当前我们要更加重视校园安全问题。 We must pay attention to the problem of the in the school at present. 2. 所有的学生都应该坚信自己能够上理想的高中。 All the students should in themselves that they can go to the ideal high schools . 3. 如果你全身心地学习的话，你将做得更好。 If you your study ,you will do better in it. 4. 广告是20世纪高度发展的行业。 Advertising is a highly industry in the century. 5.“5.12”地震已经发生两年了。 Two years passed since the earthquake on May 12,2008.