1900年，西方列强纠合为侵略联军，大举入侵中国。参与的国家一共有[ ]
A、2个
B、4个
C、8个
D、11个
答案：C
One of the most beautiful natural wonders in the United States must certainly be the Grand Canyon, ______ in Arizona.
A．and located
B．whose location
C．is located
D．which is located
社会进步的根在于（）推动。
A、经济发展
B、文化蓬勃
C、政治人民有参与国事的权
D、社会内部抵牾
