1. [单选题]Martin: Can you cover for me on Sunday? I'm supposed to teach the high school class. Lisa: Sure. ______ ? Martin: We're going to the beach for the weekend. Lisa: Well, don't worry. I'll take good care of Sunday school.
A. What's in
B. What's the thing
C. What's up
D. What's down
2. [单选题]According to the passage, the first settlers used wood for their utensils and tools because it was ______.