How long have people been sending emails?

A) since the 1980s

B) since the 1970s

C) since the 1990s

Прочитайте предложения в видо-временнойформе Present Perfect Continuous, задайте cпециальный вопрос, начиная со слов данных в скобках: Образец: It has been raining since morning. (Since when ... ?) Since when has it been raining? 1.

7. I have (lost/been loosing) my note-book. Have you (seen/been seeing) it anywhere? 8. Someone has (eaten/been eating) my sweets. They are nearly all gone. 9. I have (waited/been waiting) for you for ages! Where have you been? 10.

Задание 215. Ответые на следующие вопросы Уnотребитеsince и for в своих ответах 1. How long have you been living in this city? 2. How long have you been studying in this class? 3. How long have you been studying English? 4.

Ответьте на вопросы используя for и since. 1. How long have you lived here? 2. How long have they known each other? 3. How long have you had this coat? 4. How long has this film been on? 5. How long has he been out? 6.

Answer the following questions according to the model: Model : How long have you been laying a table? - I have been laying a table for twenty minutes. 1. How long has your mother been cooking dinner? (for two hours) 2.