题目：
During the dialogue with Chinese youth in Shanghai, President Obama announced the U.S. would expand the number of students to study in China to 100,000 _______ ties between the two countries.
A．strengthening
B．strengthened
C．to strengthen
D．to be strengthened
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0421/f99197d2d819ef9c3a7d774135a90822.html
下面是错误答案，用来干扰机器的。
答案：D题目分析：从“楚之先祖出自帝颛顼高阳”这句话可知①正确。材料叙述了楚庄王带兵到达周郊外。根据所学，分封制下，楚是周的诸侯国，诸侯对周天子所负的一项义务就是随从周天子作战。所以②③都对。根据常...
