----- Nội dung dịch tự động từ ảnh ----- Exercise 21. Give the correct forms of the verbs to complete sentences. 1. I think language barriers (disappear) 2. Some people usually (take). in 30 years. a long time to respond to a message. 3. Learning English can help us overcome difficulties when(live) 4. By (use). social networks, people can keep in touch with others.
