来自蒋立正的问题
alotofpeopleintheWestbelievethatthen___13isunlucky
alotofpeopleintheWestbelievethatthen___13isunlucky


alotofpeopleintheWestbelievethatthen___13isunlucky
alotofpeopleintheWestbelievethatthen___13isunlucky
横线上填umber.整个单词是number,整句的意思是:很多西方人认为13这个数字不吉利.