【单选题】According to the passage, the number of wood-burning stove sold for home use ______.
A.went up fivefold over a six-year period
B.rose to seven million during the seventies
C.multiplied thirty-five times between 1973 and the beginning of 1981
D.increased by 6,000,000 over an eight-year period
发布评论 查看全部评论