题目

请阅读下面四位同学的观点，从每小题所给的A、B、C三个选项中，选出一个最佳选项,并在答题卡上将该项涂黑。 It' s a hot topic among students: Is it better to study alone or in a group? Please read the following students' opinions. 49.Which of the following opinions is NOT from Candy and Mike? A.Studying alone can develop your interest. B.Studying alone can keep you away from distractions. C.Studying alone can make you set your study environment. 50.What does the underlined word procrastination mean? A.焦虑症                  设2x＋y=1，x，y＞0，的最小值为________．