B. to build a tree house

C. with the hope of joining Earth First

D. in expectation of doing something meaningful

22. The redwood trees were cut down mainly _____.

A. because they might fall over at any time

B. because they had great economic value

C. to protect other trees in the forest

D. to make space for constructions

23. Julia Butterfly Hill's living conditions in the tree were _____.

A. comfortable B. cool

C. tough D. satisfying

24. What can we learn about Julia Butterfly Hill from the text?

A. She has a sense of social responsibility.

B. She failed to protect the redwood tree.

C. She built a new house in the forest.

D. She is a self-centered woman.

There are a lot of products out there that make your life easier. Some, however, are a little sillier than others - so much that they seem like joke products. Here are a few products that sound crazy, but actually rule.

Sleep Phones

It's hard to imagine something sillier than a music-playing headband you wear while you sleep, but they exist - and are quite popular. Sleep Phones won't give you the highest quality sound in the world, but if you prefer to fall asleep to music, they're far more comfortable than normal headphones. While they're a bit