Dưới đây là từ phù hợp để điền vào chỗ trống trong bài tập:

1. English is learnt by many more people worldwide as a **foreign** language.
2. The English **language** has many words, derivatives and compounds.
3. Jack tries to **overcome** the difficulties he has when he studies English.
4. The man whom we met yesterday is **fluent** in both English and Chinese.
5. English has **borrowed** many words that come from other languages.
6. What should be done to **improve** your English vocabulary?
7. Some US spellings are **simplified** over the years, e.g. color, harbor, program.