完成句子 （根据课文内容填空，每空一词，每空一分，共15分）【小题1】my sister first had the idea to cycle along the entire

完成句子 （根据课文内容填空，每空一词，每空一分，共15分）
【小题1】         my sister      first had the idea to cycle along the entire Mekong River from where it begins to where it ends. 首先想到要骑车沿整个湄公河从源头到终点旅行的是我的姐姐。
【小题2】When I told her the air would                      and it would be very cold， she said it would be an interesting experience.当我告诉她那里空气稀薄，呼吸困难而且天气很冷时，她却说这是一次有趣的经历。
【小题3】Our legs were      heavy and cold      they felt like blocks of ice
我们的腿又沉又冷，感觉就像大冰块。
【小题4】Only then                to answer violence with violence
只有到这个时候，我们才决定用暴力反抗暴力。
【小题5】I can well remember that there was                a deep blue sky， the song of the birds，moonlight and flowers could never have kept me spellbound 
我记得曾经有一段时期深蓝色的天空，鸟的歌唱，月光和花从来没让我着迷。It， was， who/that