WHILE I WAS WALKING TO SCHOOL, I _____ AN ACCIDENT.A. WHICH B. OF...

4. - 30 BAI TRAC NGHIEM VOI KEYS FOR 9 P
30 BAI TRAC NGHIEM VOI KEYS FOR 9 P

4. While I was walking to school, I _____ an accident.

A. which B. of which C. who D. whose

A. was seeing B. see C. seen D. saw