【简答题】How might we stabilize the composition of the atmosphere? That question looms large in the eyes of scientists and political leaders as the levels of carbon dioxide grow. Carbon dioxide and methane (甲烷...
【简答题】Read the following paragraph carefully and cross out the sentence which breaks unity. 1 There are many types of pets in an average household. 2 People will often even choose pets according to their pe...
【简答题】A student writer is being asked to make an argumentative claim on a solution to a problem to which there are no easy answers. At least, the student should be able to offer a solution that will help th...