单项选择题

Anthropologists usually study simple, unindustrialized societies because the number of()is limited.

A．vehicles
B．variables
C．varieties
D．systems

<上一题目录下一题>

热门试题

单项选择题

We should do everything in our power to develop () alternatives to petrol.

A．audible
B．capable
C．liable
D．viable

单项选择题

I didn't help him. I would have ()I didn't have the money.

A．or
B．but
C．otherwise
D．still

相关试题