考试前我在书店买了两本蓝色封面的书。

I bought two ___blue books at the bookstore before the exam.

我查了蓝皮书确认这辆车的市场价格。

I checked the ___BlueBook to confirm the market price of this car.

根据蓝皮书，这辆二手车估价约为8000美元。

According to the ___BlueBook, this used car is valued around $8,000.