考博考试

【单选题】 The ozone layer plays as great a role in the stability of spaceship Earth as ______ the waters of its lakes, ponds, oceans, rivers, and streams.
A．do
B．does
C．play
D．are

网考网参考答案：A
网考网解析：
助动词+主语构成的倒装结构，强调主语，省去主要动词，又waters为复数。所以选A。 查看试题解析出处>>