有关聚落的说法正确的是[ ]
A、先有城市聚落，后有乡村聚落
B、先有乡村聚落，后有城市聚落
C、乡村、城市同时发展起来
D、最早的城市建于河流上游
答案：B
—Welcome to our city! I hope you can have a good time here.
— I'm sure I will . _______ . [ ]
A. Thank you
B. Never mind
C. That's 'right
D. Good idea
劳动法规定，劳动合同必须以书面形式订立。
