Tra từ good as gold - Từ điển tiếng Anh - Cambridge Advanced Learners Dictionary

Từ điển tiếng Anh - Cambridge Advanced Learners Dictionary

be as good as gold be (as) good as gold idiom (of a child) to behave very well • She's been as good as gold all morning. Thesaurus⁺: ↑Behaving well Main entry: good_idiom