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        1. —We should do what we can ________ the endangered animals.
          —Yes, it’s our duty_________ them.
          A.save; to protectB.save; protect
          C.to save; protectD.to save; to protect
          D

          試題分析:句意:我們應(yīng)該做我們能做的來(lái)拯救瀕臨滅絕的動(dòng)物。是的,保護(hù)他們是我們的職責(zé)。To do表示目的,It is +adj.+to do.結(jié)合句意,故選D
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