Question Words: 

Practice here with written text.

Practice speaking (coming soon).

how much? Ikura
what Nani
what day of the week Nan-yoobi
what kind? Donna
what language Nani-go
what number Nan-ban
when Itsu
where Doko
which one (of two) (polite) Dichira
which thing (of more than two) Dore
who Dare

Dochira    vs.   Dore

A to B to(two choices) doshira ga suki desu ka. 
A to B to C to(three or more choices)  dore ga suki desu ka.
Dochira mo (both) suki desu.   
Dore mo (all of them) suki desu.
Dochira mo(netiher) suki dewa (or ja) arimasen.  
Dore mo
(non of them) suki dewa (or ja) arimasen。  
A ga suki desu. (I) like A.