{{B}}quEstions 15-18{{/B}}

A、Borrow morE thAn onE Book At A timE.
B、kEEp Any Book For up to A wEEk.
C、kEEp mAstEr CopiEs AnD rEFErEnCE Books morE thAn A wEEk.
D、Borrow Books As soon As onE gEts thE BorrowingCArD、