1.When the students take a trip on the intra coastal-waterway system next month, they will learn facts with which they have heretofore been unacquainted.
2. Even though California is smaller than Alaska or Texas it has a far larger population.
Texas, California has by far the largest population.
3. 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…
4. 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.
5. The unique culture of Cork is primarily founded by its great musical and lyrical traditions.
Cork has a unique culture founded primarily on