Look out! Don’t get too close to the tower ______ top is under repair.

It was strange that he _____ have utteredsuch rude remarks on that occasion

Did you hear the news about the fire in our building—Yes. It took the firemen two hours to __________ the fire.

The point is that no medicine is ________for children when they are infected with the hand-foot-mouth disease ．

Is China ______ country in the world —No. It’s ____ country.