According to Xi, common values held by Chinese people of all ethnic groups are ________ for the country's future and its people's well-being.
Matter is anything____
She wrote a letter to her father, ___ she made her secret known.
The factory ___ I am going to is the place ___ my mother used to work many years ago.
The last river __ _ they crossed is two miles wide.
This is one of the means ____t he electic energy is conducted from one place to another.