The professor was so ______, hardly anyone came to class.
A.popular B.boring C.friendly D.lively
Jake’s passed his exams. We’re going out to ______.
A.joke B.invite C.celebrate D.argue
We couldn’t understand: what could ______ his sudden change of mind?
A.enjoy B.explain C.accept D.mean
I didn’t mean to break your vase—it was just ______.
A.an accident B.an advantage C.an agreement D.an experience
He was breathing ______ after the relay race.
A.heavily B.slowly C.carefully D.weakly
People are concerned about the quality of the air they ______.
A.hear B.eat C.drink D.breathe