填空（每空一词）Someone asks w____ we learn English .B_____it is one

填空（每空一词）
Someone asks w____ we learn English .B_____it is one of the w____most important languages and it's also w____ usrd in the modern world.I______ you travel all over the world.you 'll find English e___ .you can enjoy s____ much knwledge.