There are only big trees on one side of the street，different flowers lie on ______．（　　）

A．otherB．anotherC．the other

______ October 1，we will celebrate the seventieth birthday of the People's Republic of China．（　　）

A．OnB．InC．At

Every one of us ______ always breathe the same breath and share the same future as the people．（　　）

A．mightB．shouldC．could

______ lucky they are，I thought，to have each other．（　　）

A．What aB．WhatC．How

The world is changing with every second；and China，______ too，with every second．（　　）

A．is changingB．had changed

C．changed