The U.S. first lady Michelle Obama, arrived in China on March 20, 2014 for _______ six-day visit, focusing on _______ importance of cultural exchanges.
The watch is as________as that one.
Miss Wang is________taller than me.
—Who is________,Tom or Mike? —Tom is.
—Who listens________,Erie,Brad or Rick? —Of course Brad.
The world’s population is growing________and there is________land and water for humans.