一、1、The filibuster on voting-rights legislation went on for three days and nights; senators slept when they could on benches in the hall.nights; therefore, it meant that senators would sleep when possible.原句没错，两句完整，罩子没有问题。而下面的选项，it的出现使得主语混乱。2、The programmers always talked of having too much to do, but in truth they had a lesser amount of work to do than their colleagues. they had less work to do thantheir work was the least among原句繁琐。下面的选项前后主语不一致，而正确选项避免了以上两个问题。3、In German
