27.If you ________ to something different, for example to a different system, task, or subject of conversation, you change to it from what you were doing or saying before.
I have been convinced that the print medis are usually more___and more reliable than television
—Volunteering is becoming___popular in China —Yeah,people are now aware that helping others is helping themselves
I___all the cookig for my family,but recently I’ve been too busy to do it
One-third of the country___covered with trees and the majority of the citizens___black people
You can’t predict everthing.Often things don’t ___ as you expect