—Is that Dec.21,2012 is the end of the world true?—Definitely not, but ______ must be paid to global climate change.
Things worthy ______ should be done without delay.
I would have felt more comfortable if you _______ receiving my email a little more quickly.
Do you know how pumpkins got _______ with Halloween?
I don’t think 200 yuan for a night in that hotel was expensive. It _________ you more.
The boss _________ that the workers work extra hours to complete the task.