Dưới đây là các từ phù hợp để điền vào chỗ trống:

1. My daughter often **looks** up new words in the English - English dictionary.
2. You should learn a language by **practicing** it rather than by learning it in a class.
3. His sister has to learn English well because she is **working** for multinational company.
4. There are many **differences** in accents and dialects between varieties of English.
5. My brother is **good** at English because he has some friends who are native speakers of English.
6. Is English the language **spoken** as the first language by most people in the world?