题目

 有“世界屋脊”之称的海拔最高的高原是（    ） A．青藏高原            B．蒙古高原      C．东非高原      D．帕米尔高原 答案：A6、Either of them can take this job，but I wonder who does everything __________． A．the most careful                               B．more careful C．most carefully                                        D．more carefully