21．—When did accident happen?
—Let me see. It was on very hot afternoon in July so there was not much traffic in the street.
A．the; the B．an; 不填 C．an; the D．the ; a
22. ___ snacks and drinks, but they also brought cards for entertainment when they had a picnic in the forest.
A. Not only they brought B. Not only did they bring
C. Not only brought they D. Not only they did bring
