单项选择题

The European Union countries were once worried that they would not have supplies of petroleum（）

A. pure
B. efficient
C. potential
D. sufficient

<上一题 目录 下一题>
热门 试题

单项选择题
If （） and lodging are included in educational fees, a university student in the U.S. will need approximately $10,000 a year.

A. meal
B. board
C. food
D. provisions
单项选择题
The poor countries are extremely ______ to international economic fluctuations.
A. inclined
B. vulnerable
C. attracted
D. reduced
相关试题