Question 1
正确答案: C
Question 2
正确答案: H
Question 3
正确答案: A
Question 4
正确答案: B
Question 5
正确答案: D
Question 6
正确答案: shells
Question 7
正确答案: lake
Question 8
正确答案: rainfall
Question 9
正确答案: grains
Question 10
正确答案: pottery
Question 11
正确答案: B
Question 12
正确答案: A
Question 13
正确答案: D
Question 14
正确答案: A