They will build nature reserves protect birds.
A. to; in danger
B. for; endangered
C. to; endangered
D. for; in danger
网友回答
A. to; in danger
B. for; endangered
(答案→)C. to; endangered
D. for; in danger
解析：本句的意思是“他们将建立自然保护区来保护濒临灭绝的鸟类。”根据protect是动词原形，故应该用to；“濒临灭绝的”是endangered。所以本题选C。