题目

 Little ______ about his own safety, though he was in great danger himself. A. cared he        B. he cared            C. did he care        D. was he cared 答案：C受全球气候变暖的影响，近年来我国森林鼠害有加重趋势，严重威胁着A.黄土高原水土保持林B.沿海防护林C.东北、西南天然林D.西北、东北防护林