Listen for more details. Answer the questions below. Which instrument ... is good for your health? ______ was invented in the 1940s? ______ is made from old oil containers? ______ is the national instrument of its country? ______ Which two instruments ... are played all over the world today? ______ are very old? ______ used to be played only by men? ______ 空1选项：1、steel drums2、didgeridoo3、horsehead violin空2选项：1、steel drums2、didgeridoo3、horsehead violin空3选项：1、steel drums2、didgeridoo3、horsehead violin空4选项：1、steel drums2、didgeridoo3、horsehead violin空5选项：1、steel drums2、didgeridoo3、horsehead violin空6选项：1、steel drums2、didgeridoo3、horsehead violin空7选项：1、steel drums2、didgeridoo3、horsehead violin