12.One of the best ways for people to keep fit is to ________ healthy eating habits.
As a result of the snowstorm, the village was ____ from the outside world for more than a week.
Jimmy is a true hero, ______ always thinks more of others than of himself.
Tens of thousands of people starved to _____ when the two countries were at war.
______ many people’s expectation, he was defeated in the first round.
I could hardly believe he ______ have been taken in by such a simple trick.