Para.5 2.Although the advent of modern conveniences may have made many people temporarily more productive and thereby able to free up valuable time,it also increased their work load-because with the extra time,many individuals merely added more chores to their day 此句是复合句，主语是it also increased their work load. Although.;because..分别是让步状语从句和原因状语从句。 译文： 虽然现代化便利设施的使用可以让许多人暂时提高效率，从而享受 宝贵的自由时间，但它也加重了他们的工作负担一因为有了更多 的时间后，很多人只会在自己每天的日程中加上更多的琐事。 Para. 5 2. Although the advent of modern conveniences may have made many people temporarily more productive and thereby able to free up valuable time, it also increased their work load—because with the extra time, many individuals merely added more chores to their day. 此句是复合句，主语是it also increased their work load. Although...; because...分别是让步状语从句和原因状语从句。 译文： 虽然现代化便利设施的使用可以让许多人暂时提高效率，从而享受 宝贵的自由时间，但它也加重了他们的工作负担——因为有了更多 的时间后，很多人只会在自己每天的日程中加上更多的琐事