题目

What the expert has said and done will be _______ to the department managers. A. value        B. benefit        C. of valuable    D. of benefit 答案：D 解析: be +抽象名词相当于形容词。be of benefit=be beneficial。____, they didn’t do well in helping each other with their study. A. To honest B. Honest　　 　C. To be honest　 D. To be honestly