das
			der
			die
			was
			welche
			welcher
			welches
			wer

about which  above which  according to which  after which  against which  among which  around which  at which  by which  for which  from which  From which time period is this?  From which track does the train leave?  in front of which  in which  In which language do they show it?  of which  on which  On which date?

On which day?  over which  through which  To which account number?  under which  Under which name?  Under which number?  Which bus goes to New York?  Which bus goes to the main station?  Which drugs?  Which hotel are you in?  Which hotel are you staying at?  which is why  Which material is it made of?  Which one do you want?  Which sizes do you have?  Which way from here?  with which