1. Even though California is smaller than Alaska or Texas it has a far larger population.
Texas,California has by far the largest population.
2.When the students take a trip on the intracoastal-waterway system next month,they will learn facts with which they have heretofore been unacquainted.
3.The unique culture of Cork is primarily founded by its great musical and lyrical traditions.
Cork has a unique culture founded primarily on
4.In June,Juile was certified in CPR and aquatic rescue,and she has been working as a lifeguard ever since.
点评：这也是一种题型，死记吧。。。某人在做完某事后一直做某事：Sb has been working as…ever since…
5. One of the most unusual animals in the world,eggs are laid by the platypus,which is also a mammal.
the platypus is a mammal that also lays eggs.