[单选题][A] who [B] when [C] where [D] which
[单选题][A] so [B] once [C] as [D] where
[单选题][A] why[B] when[C] while[D] where
[单选题][A] that [B] which [C] than [D] as
[单选题]A. thanB. thatC. whichD. as
[单选题][A] which [B] that [C] what [D] it
[单选题][A] which [B] what [C] that [D] it
[单选题]A. what B when C which D that
[单选题][A] which [B] that [C] what [D] when
[单选题]A.) whenB.) howC.) thatD.) which