20.—Is that Dec. 21, 2012 is the end of the world true? —Definitely not, but________must be paid to the global climate change.
He ______ in this city since he graduated from college.
You _____ return my dictionary now. You can keep it and I will get it from you later.
It was at the end of the meeting _____ Mr. Smith made the decision.
English _____ all around the world.
Middle school students can _____ a lot from the Chinese-Engli sh dictionary.