还在对着GMAT语法难题不知如何是好?北京新东方GMAT教师周谢慧和王燚在此为大家带来详细的题目解析。

　　(GWD-TN-1-24) By sucking sap from the young twigs of the hemlock tree, tree growth is retarded by the woolly adelgid, causing needles to change color from deep green to grayish green and to drop prematurely.

　　A.tree growth is retarded by the woolly adelgid, causing needles to change color from deep green to grayish green and to drop

　　B.tree growth is retarded by the woolly adelgid, and this causes the color of needles to change from deep green to grayish green, and their dropping

　　C.the woolly adelgid retards tree growth, which causes needles to change color from deep green to grayish green, and dropping

　　D.the woolly adelgid retards tree growth, causing needles to change color from deep green to grayish green and to drop

　　E.the woolly adelgid retards tree growth, and this causes the color of needles to change from deep green to grayish green, and the their dropping

　　以上是北京新东方GMAT教师周谢慧和王燚为大家带来的关于GWD-TN-1-24的详细解析。

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