Answers: A, C, D

According to Article 8 of the Trademark Law, sound can be applied for registration as a trademark, so item A is correct. According to Article 22, Paragraph 2 of the Trademark Law, a trademark registration applicant can apply to register the same trademark for multiple categories of goods through one application, so item B is wrong. According to Article 10, Paragraph 1, it can be seen that anything that is the same as the name or logo of a central state agency, the name of a specific place where it is located, or the name or figure of a landmark building shall not be used as a trademark, so item C is correct. According to Article 14, Paragraph 5 of the Trademark Law, producers and operators are not allowed to use the words "well-known trademark" on commodities, commodity packaging or containers, or in advertising, exhibitions or other commercial activities, so D The item is correct.