单项选择题We can conclude from the passage that ().
A. we should pity a11 such unhappy people B. such unhappy people are dangerous to social life C. people can get rid of the habit of unhappiness D. unhappy people can not understand happy persons
单项选择题What is the author’s purpose in taking Cubatao as an example
单项选择题Which of the following is right according to the passage
单项选择题3().
A.exit B.turning C.crossing D.entrance
问答题成年人应该知道如何帮助孩子们在智力上发展。