问题补充:
We should do what we can the endangered animals.
----Yes,it’s our dutythem.
A. save; to protect
B. save; protect
C. to save; protect
Dto save; to protect
答案:
A. save; to protect
B. save; protect
C. to save; protect
(答案→)D. to save; to protect
解析:句意:我们应该尽力挽救濒临灭绝的动物。是的,保护它们是我们的职责。上句考查不定式做定语,下句考查不定式做主语,故选D。