Human beings are different from animals _____ they can use language as a tool to communicate.
—Is your school bigger than ours? —Yes. I guess it is________your school.
The disease, ________, could spread very fast.
To prevent cybercrime more efficiently, it is important to make new laws and create international standards for them similar to________concerning international airspace.
I________have gone the concert because I know nothing about that kind of music.
.—Why are the housing prices in big cities going up all the time? —One reason is that people are________into overcrowded cities in great numbers.