Definition: a set of stamps, tickets, etc. that are fastened together inside a cover Level: C2
我买了一本地铁票册，用于每日通勤。
I purchased ___a ___book ___of metro tickets for my daily commute.
为了方便，她总是直接买一套十张的渡轮船票。
For convenience, she always buys ___a ___book ___of ten ferry tickets at once.
他在书桌抽屉里放着一本一等邮邮票。
He keeps ___a ___book ___of first-class stamps in his desk drawer.
