He made another wonderful discovery, _________ of great importance to science.
Nicolaus Copernicus’ discovery about the universe is ______, which ______later achievements in astronomy science.
We the Chinese are not to be ______, ________the situation is.
People should be cautious ______their personal information when surfing the Internet so as to prevent certain computer viruses ______ it.
The local police were______ by their authorities to _____ the situation as soon as possible.
Only when people have enough to eat and plenty to wear _______ to talk about environmental protection.