When products made in factories , they are thrown away as garbage.
A. e to an end
B. are put to use
C. are used up
D. wear out
网友回答
A. e to an end
B. are put to use
C. are used up
(答案→)D. wear out
解析： wear out本题中意指（bee useless form continued use of wear）用坏，穿破，如：The machine will soon wear out.(这机器即将用坏。)e to and end(结束)，put ... to use(投入使用), use up(用完)， e into use(开始投入使用)。