We all know about the_____ that smoking can do to our health.
A、hurtC
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Eachstudentistogiveashort___(speak)totherestoftheclassattheendofthesemester.
They knew they had to________action to deal with the plague before it spread to other areas.
That is ______ we differ.
Peopletodayarehighlyconcernedaboutthequalityoftheairthey___(breath).
Just a few years ago，Tanya was___(home)and begging for money in front of a supermarket in New York City.
