（2010·北京市通州区高三一模） 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
（2010·北京市通州区高三一模） 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
D