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
She walked home by herself, ______ she knew that it was dangerous.
A．if B．so that C．although D．because
