843.The use of chemical pesticides in this country is equally extensive or more so than ten years ago.
　　(A) equally extensive or more so than ten years ago
　　(B) equal to or more extensive than ten years ago
　　(C) as extensive as ten years ago or more
　　(D) equal to, if not more, than ten years ago
　　(E) as extensive as it was ten years ago, if not more so
　　the key:E
　　866.Tiny quantities of more than thirty rare gases, most of them industrial by-products, threaten to warm the Earth’s atmosphere even more rapidly than carbon dioxide during the next fifty years.
　　(A) to warm the Earth’s atmosphere even more rapidly than carbon dioxide during the next fifty years
　　(B) to warm the Earth’s atmosphere even more rapidly over the next fifty years than carbon dioxide will
　　(C) during the next fifty years to warm the Earth’s atmosphere even more rapidly than carbon dioxide
　　(D) a warming of the Earth’s atmosphere during the next fifty years even more rapid than carbon dioxide’s
　　(E) a warming of the Earth’s atmosphere even more rapid than carbon dioxide’s will be over the next fifty years
　　the key:B