21. _________with a tough job market, many fresh graduates are dreaming of running their own business instead.
A. Facing B. Faced C. Face D. To face
22. George was responsible for the accident because he didn’t give a______ to other drivers.
A. notice B. mark C. symbol D. signal
23. _______ancient Olympic Games began around the year 776 BC in_______ Greece.
A．An; the B．An; / C．The; / D．/; the
