[单选题]A. when B once C while D whereas
[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]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]( ) means that the seller delivers when the goods, once unloaded from the a
[单选题]( ) means that the seller delivers when the goods, once unloaded from the a
[单选题]As John Lennon once said, life is _____________ happens to you while you ar
[单选题][A] but [B] whereas [C] though [D] while
[问答题]Once upon a time, some children were playing at seaside when they found a t