Answer and Explanation
The present simple passive sentence has the form as following:
Subject + be + Verb in the past participle.
1. Emails are sent and received by most internet users.
(“Emails” is a plural noun, so that “be” -> “are”; “sent” is the past participle form of “send”)
2. Information about goods and services is found.
(“Information” is a singular noun (uncountable), so that “be” -> “is”; “found” is the past participle form of “find”)
3. Goods and services are bought in e-shops.
(“Goods and services” is a plural noun, so that “be” -> “are”; “bought” is the past participle form of “buy”)
4. Online newspaper and magazines are read mostly by adult users.
(“..newspapers and magazines” is a plural noun, so that “be” -> “are”; “read” is the past participle form of “read”)
5. The internet is used for social networking, especially by young people.
(“The internet” is a singular noun – as uncountable, so that “be” -> “is”; “used” is the past participle form of “use”)
6. Telephone and video calls are made.
(“Telephone and video calls” is a plural noun, so that “be” -> “are”; “made” is the past participle form of “make”)
7. Videos and films are watched.
(“Videos and films” is a plural noun, so that “be” -> “are”; “watched” is the past participle form of “watch”)
8. Listening and music streaming activities are carried out.
(“...activities” is a plural noun, so that “be” -> “are”; “carried” is the past participle form of “carry”)
9. Hotel accommodation is searched for by travellers.
(“Hotel accommodation” is a singular noun, so that “be” -> “is”; “searched” is the past participle form of “search”)
10. Financial transactions through internet banking are done.
(“Financial transactions” is a plural noun, so that “be” -> “are”; “done” is the past participle form of “do”)
