摘要:
Outing 题目描述 Organising a group trip for the elderly can be a daunting task... Not least because of the fussy participants, each of whom will only make 阅读全文
摘要:
Clock Pictures 题目描述 You have two pictures of an unusual kind of clock. The clock has n hands, each having the same length and no kind of marking whats 阅读全文