问题
选择题
The new method Mr．Wang has been devoted to _____ effective．
A．is proved
B．to prove
C．being proved
D．proves
答案
答案：D
考查系动词用法和句子结构。在本句中定语从句Mr．Wang has been devoted to修饰先行词the new method,横线上所填部分是谓语部分，prove effective构成系表结构。因主语是单数，故使用proves.故D正确。