考博考试

试题来源：考博英语-214
【单选题】 Part of the lake has been polluted. You can see the water is covered with ______ oil.
A．a coat of
B．a story of
C．a film of
D．a pad of

参考答案：C
网考网解析：
[解析] a coat of一层……涂层；a story of一层……楼；a film of一薄层... 查看试题解析出处>>