An analysis of tree bark all over the globe shows that chemical insecticides have often spread thousands of miles from where they were originally used.
-
Athat chemical insecticides have often spread thousands of miles from where they were originally used
分析该选项
-
Bthat chemical insecticides have spread, often thousands of miles from their original use
分析该选项
-
Cchemical insecticides, having often spread thousands of miles from where they were used originally
分析该选项
-
Dchemical insecticides, often spreading thousands of miles from where their original use
分析该选项
-
Echemical insecticides, often spreading thousands of miles from where they were originally used
分析该选项