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问题: 有关于非谓语动词28

With the extinction of many wild plants and animals,experts worry that the_______species program itself may be ____
A.threatening.threatening B.threatened,threatened C.threatening,threatened D.threatened,threatening
要详细的和思路












解答:

With the extinction of many wild plants and animals,experts worry that the_______species program itself may be ____
A.threatening.threatening B.threatened,threatened C.threatening,threatened D.threatened,threatening

关键是从句子意思上来理解
全句的意思是:
随着大量野生动、植物的灭绝,专家们都担心(<保护>受到灭绝威胁动植物)种属计划本身也会迎来挑战(威胁)。
所以,两处均是表示被动语态
答案:B