7. “HOW MANY PAGES………SO FAR

7 . - BAI KIEM TRA 45 SO 1 TIENG ANH 9
BAI KIEM TRA 45 SO 1 TIENG ANH 9
7

. “How many pages………so far?” - “Ten”.

A. do you sduty B. did you study C. have you studied D. had you studied