His friends were ___________and encouraged him to publish his ideas, but Copernicus was cautious.
It is very ______ that she will ring me tonight.
---Could you turn the TV down a little bit? ---______. Is it disturbing you?
--I’m going to the States? --How long ________ you________ in the States?
Rather than _________ on a crowded bus, he always prefers _________ a bicycle.
__________ of the students who took part in the military training is 450.