南海撞机为什么不击落:which letter goes all around an island?选择题

Which letter goes all round an island? which letter goes all around an island?选择题 Which letter can fly? Which letter is an insect? Which letter is a drink? Which letter is a vegetable? Which letter is a drink? Which letter is different to understand? Which letter is a kind of dink? Which letter is a kind of drink and which letter is difficult to understand?是什么意思