单项选择题By comparing the culture to the director, the author purports to ______.
单项选择题Which of the following is NOT true of the panel of the Council on Foreign Relations
单项选择题By we whistle past the rest home as well as the graveyard , it is meant that ______.
单项选择题What does it in the first sentence of Para. 2 refer to
单项选择题Why does the author think it necessary to heed the demographic changes in Europe and America