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

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.)

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

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

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

Choose the correct option. Then change the information to make the sentences true for you. (Chọn phương án đúng. Sau đó, thay đổi thông tin để làm cho các câu đúng với bạn.)

1. We listened to the teacher during / for the French lesson.