Номер 3 ПОМОГИТЕ ПОЖАЛУЙСТА СРОЧНО Даю баллы

Ответ:

2) My grandparents have joined Facebook.

3) We have posted twenty photos on Instagram so far on this trip.

4) I haven't written a tweet in English.

5) I haven't watched any of Amy's music video on YouTube. Have you?

6) He has gone to pick up his new tablet from the shop in town. He'll be back later.