题目内容
（请给出正确答案）
[主观题]
Look at the four squares [■] that indicate where the following sentence could be added to
the passage. Developed countries, for example, invariably have a nuclear family system, which facilitates social and geographical mobility. Where would the sentence best fit？
A．Square Ａ.
B．Square Ｂ.
C．Square Ｃ.
D．Square Ｄ.
如搜索结果不匹配，请 联系老师 获取答案
