多选题 When they purchased the hilltop property, they were blissfully ______ of the fact that it stood directly in the flight path of the local airport.

A、 ignorant
B、 apprised
C、 chary
D、 unconscious
E、 staggered
F、 extolled

【正确答案】 A、D

【答案解析】If they were blissful, they were not surprised (choice F) or suspicious (choice C). The two synonyms are ignorant (choice A) and unconscious (choice D).