Verb conjugation of "tacere" in Italian

The picture I sent yesterday was taken on the first evening. And this morning the email bounced back. The user has already uploaded 3 different pictures of himself, all with the same facial expressions.
The last sentence is the hardest in the entire series. Writing may bore some people, but it is considered the best training in language learning. It is a skill that can lift you from intermediate to advanced level. Do not neglect it.
What are you studying? Maybe we can write emails to each other in English or German. Thank you for your e-mail which I have received on Vocabulix just now. Write me if I can help you in learning German.