Question 1
正确答案: gene|GENE
Question 2
正确答案: power/powers|power|powers|POWER|POWERS
Question 3
正确答案: strangers|STRANGERS
Question 4
正确答案: erosion|EROSION
Question 5
正确答案: islands|ISLANDS
Question 6
正确答案: roads|ROADS
Question 7
正确答案: fishing|FISHING
Question 8
正确答案: reproduction|REPRODUCTION
Question 9
正确答案: method/methods|method|methods|METHOD|METHODS
Question 10
正确答案: expansion|EXPANSION