Question 1
正确答案: lettuces
Question 2
正确答案: 1, 000 kg,1000 kg
Question 3
正确答案: food consumption,consumption
Question 4
正确答案: pesticides
Question 5
正确答案: journeys
Question 6
正确答案: producers
Question 7
正确答案: flavour,flavor
Question 8
正确答案: A
Question 9
正确答案: C
Question 10
正确答案: B
Question 11
正确答案: A
Question 12
正确答案: B
Question 13
正确答案: C