offer_list=['Allen', 'Tom']
for i in offer_list:
    if i=='Allen' or i=='Tom':
        print(i+", you have passed our interview and will soon become a member of our company.")

tom_index=offer_list.index("Tom")
offer_list[tom_index]="Andy"
for i in offer_list:
    if i=="Andy" or i=='Allen' :
        print(i+", welcome to join us!")
        
一定要注意标点符号，调试了三次，最后一次就是直接拷贝了题目的print内容