对油轮，为防止在油舱内油面上方形成可引起爆炸的混合气体，要充添惰性气体，使舱内氧气含量降至（）。
A、15%以下
B、12%以下
C、8%以下
参考答案：C
The new couple spent some money for the________ of the furniture necessary for their new house.[ ]
A. distribution
B. manufacture
C. donation
D. purchase
I'm going to watch the soccer game _____ the Japanese team (队) and the Chinese team.[ ]
A. between
B. of
C. on
