A:2
B:2 3
C:4
D:4 3
哥哥今年a岁,弟弟今年b岁,经过x年后,两人相差____岁。
- Do you know Victory Day in China?
- Yes, it's _______ September 3rd _______ each year. It tells the world that Chinese people love peace and hate wars. Chinese people will never forget the history.