单项选择题

Butter is cheap when it is plentiful, and ______ when it is in shortage.

A．costly
B．expensive
C．dear
D．priceless
<上一题 目录 下一题>
热门 试题

单项选择题
A．respectivelyB．eachC．allD．more
A．respectively
B．each
C．all
D．more
单项选择题
A．observationB．captureC．phenomenonD．process
A．observation
B．capture
C．phenomenon
D．process
相关试题