THE AIR-HOSTESS KNOWS THE TIME SHE HAS BEEN HERE, _____

12. - CAC DANG BAI TAP TRAC NGHIEM TIENG ANH
CAC DANG BAI TAP TRAC NGHIEM TIENG ANH

12. The air-hostess knows the time she has been here, _____?

a. does she b. isn’t it c. doesn’t she d. did she