The grounds of the presidential palace are ______ by soldiers with guard dogs 24 hours a day.

单项选择题A ______ of the long report by the budget committee was submitted to the mayor for approval.

单项选择题Last month disagreements about who should be ______ to vote brought registration to a halt.

单项选择题There is a ______ among teachers that children should have a broad understanding of the world.

单项选择题If you don't understand the new vocabulary you could ask your teacher to explain it or, ______ , you could look it up in a dictionary.

单项选择题The large crowds lingering in the streets were quickly ______ by heavy rain.