Viết lại câu sao nghĩa không đổi: The Amazon River is longer than the Mekong river

Nghĩa ko đổi
1 The Amazon River is longer than the Mekong river
=>The mekong river...........................................
2 why don't we go out for a change?
=>How.....................................
3 My mother walks to her office every morning
=>My mother goes ................................................
4 No one in my family is older than my grandfather
=>my grandfather....................................................