Green products are becoming more and more popular because they are environmentally______.

A.friendly                                  B.various

C.common                                  D.changeable

A


解析:

friendly意為“友好”，指親切的、友善的、沒有敵意的。environmentally friendly表示對環(huán)境不會造成危害。various意為“多樣的，多方面的；富于變化的”。common意為“普通的，通常的，尋常的，平常的”。changeable意為“可變的，易變的，會變的；不確定的；無恒心的”。

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