It is enough to ________ the tree. Tell him not to ________.
A.cut down, cut it up,B.cut down, cut up it,C.cut up, cut down it,D.cut up, cut it down.在线课程A
解析：
cut down表示“砍倒”，而cut up表示“砍碎”；
根据句意应为：“把书砍倒就够了，告诉他不要砍碎了”．