---Mary, I heard there was an explosion in Luzhou. Could you tell me how it _______?---Sorry, I don’t know much about it either.
Bob _____a series of brutal murders. A. committed C. crimed C. commited D. did the wrong
Costs have been reduced ___20% over past year.
Don’t touch him, for he is a ______person.
He is a ______ traveller.
—Where will you start your work after graduation? —Mmm, it's not been decided yet. I ____ continue my study for a higher degree.