Which verb best completes the sentence: 'The new policy ______ itself as a standard method in international trade over the past decade.'
答案解析
**Core Concept:** Vocabulary - Contextual usage of verbs.
**Analysis:** The verb 'established' (B) means 'to gain acceptance' in this context, matching the gradual recognition implied by 'over the past decade.'
**Wrong Options:**
- 'Maintained' (A) implies keeping an existing status, not new recognition.
- 'Abandoned' (C) and 'Rejected' (D) contradict the context of becoming a standard.
**Key Clue:** Temporal phrase 'over the past decade' suggests a process of gaining acceptance.
正确答案：B