I think the popularity of land phones / mobile phones will continue until the end of this century.

Read the text. Choose the correct answer. Then listen and check. (Đọc văn bản. Chọn câu trả lời đúng. Sau đó lắng nghe và kiểm tra.)

As soon as / While my father graduated from high school, he became an environmental activist and a conservationist.

While working on the experiments / patents, Thomas Edison found out the material that could serve as a long-lasting filament.

Read the sentences below and choose the best option. (Đọc các câu dưới đây và chọn phương án tốt nhất.)

1. The Internet / TV became popular during the 1980s and 1990s and gained its popularity until today.

As soon as the first smart phone was released for purchase in 1994 / 1984, everyone was surprised at what it could do.

Complete the sentences. Write five true sentences and one false. (Hoàn thành các câu. Viết 5 câu đúng và 1 câu sai.)

1. While I was going home yesterday, I …

2. As soon as I got home, I …

3. During the evening, I …

4. I didn't go to bed until …

5. I was fast asleep by …

6. When …