问题描述：
Morrel rose and advanced to the door,but his strength failed him and he sank _ _ _a chair .A...
Morrel rose and advanced to the door,but his strength failed him and he sank _ _ _a chair .
A.into B.to C.on D.off
Morrel rose and advanced to the door,but his strength failed him and he sank _ _ _a chair .
A.into B.to C.on D.off
问题解答：
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