Learning is ____ lifelong journey because every day brings something new．（　　）

Dad， my bike is broken．____I use yours？

Sure! It's in the backyard．（　　）

The People's Republic of China was founded ____ October 1st， 1949． We'll celebrate its 70th anniversary this year．（　　）

Volunteering _____ the world warmer． Even small things can make a big difference．（　　）

Wang Yangming is a great educationalist _____ developed most of his thoughts in Xiuwen．（　　）