Question 1

正确答案：C

Question 2

正确答案：F

Question 3

正确答案：E

Question 4

正确答案：D

Question 5

正确答案：D

Question 6

正确答案：B

Question 7

正确答案：A

Question 8

正确答案：E

Question 9

正确答案：B

Question 10

正确答案：C

Question 11

正确答案：waste

Question 12

正确答案：machinery

Question 13

正确答案：caution