12. Half of the students will have sports, and the rest _____ to be here in the classroom studying.
In face of failure for the moment ,it’s the most important to_____a good state of mind.
The first color TV set was considered by most people________this century.
Every minute should_______to work for the motherland.
Some kinds of animals can _______ the colour of their surroundings.
How I wish that I could ______ my ideas in simple and wonderful English when chatting on the net.