Palavra da semana: quem
Exemplo: Quem é? Sou eu.
Word of the week: who
Example: Who is it? It's me.
Remark: You can find more questions words in my Portuguese Grammar book (page 78), CD-ROM course (lesson 15) and also on my website.
If you want to learn Portuguese beyond the basics, check out my Portuguese Grammar book and CD-ROM course, which are available for sale on my website.