单项选择题
The old man carries an umbrella ______he goes out for a...
单项选择题The old man carries an umbrella ______he goes out for a walk.
Why must we ______to the established standards of the c...
单项选择题Why must we ______to the established standards of the culture
The Summer Palace is one of the most popular tourist __...
单项选择题The Summer Palace is one of the most popular tourist ______in China.