[单选题]___________[A] when[B] once[C] while[D] whereas
[单选题][A] but [B] whereas [C] though [D] while
[单选题][A] While [B] When [C] Though [D] Unless
[单选题][A] why[B] when[C] while[D] where
[单选题][A] meanwhile [B] unless [C] whereas [D] for
[单选题][A] provided[B] since[C] whereas[D] though
[单选题]He would once in a whilelose his temper when he found himself involved in a
[单选题][A] so [B] once [C] as [D] where
[单选题][A] as [B] when [C] if [D] so
[单选题]___________A.] when[B] since[C] for[D] whereas