Subsequent to the expansion of university enrollment, great changes of college student qualities have taken place.2. Einstein is the hero for those who explore science at its deepest level.3. Concealed in the words of Jack are many meanings that do not appear on the surface but deserve pondering on.4. The young man pushed and pulled with all his might, but the door remained firmly closed.5. The refugees would be grateful for the prompt delivery as they are in desperate need of the food