四六级考试

【单选题】 Ireland's total primary energy requirements ten years ago amounted to 8 billion tons of oil equivalent, ______ 38% was produced from indigenous sources.
A．which
B．of which
C．part of which
D．out of which

网考网参考答案：B
网考网解析：
[题解] 本句是定语从句。可以用of which 38% was produced from indigenous sources，也可以38% of which was produced from indigenous sources。这里指的是80亿吨石油中有38%是本国生产的。 查看试题解析出处>>