The meaning of a smile is.......................... People everywhere know what it means.
universal
With today's easy travel, diseases can...............quickly.
spread
Our ............................... were much shorter than people are today.
ancestors
Carbon dioxide is a .................. of carbon and oxygen.
compound
7. Shoulda is a..................... of should have.
reduction
A picture can often..................... a message more effectively than words.
get across
Chinese is a very ............,, written language -- It consists of thousands of characters.
complex
Putting your hand up is a ................ that means stop.
gesture
