智力测试What is black when it is clean and white when it is dirty?

智力测试What is black when it is clean and white when it is dirty? 智力测试（英语）What dog never barks?What letter is a drink?What is black when it is clean and white when it is dirty?What makes a girl into a woman? What is the word that becomes shorter if you add er to it是智力测试 英语智力测试体.What is it that doesn't ask questions but must be answered? 英语智力测试题~两道IQ题：what makes a road broad?what table is in the field? Which letter is an insect?智力测试 It is light.It travel aruond the world but still stays in one corner.What it is?智力测试 智力测试： 英语 智力测试智力测试why did the boy make his dog sit in the sun?what is the smallest bridge in the world?what is the difference between the Noeth Pole and the South Pole? 智力测试,look at the numbers below .What is the number after 48?9,12,21,48 What is'the Penny Black'? 英语翻译What is Mr Black? what has a neck but no thorat智力测试,急! What letter looks like a flag?智力测试kuai 智力小测试what's the next?Hello Over Red Mr brown can speak english and french,Mr black can speak CHinese and English.Mr WHite can only talk to Mr Brown What language does Mr White speak是一道智力测试题 英语奥赛趣题--智力测试 7A botttle of wine cost $10,if the wine is worth $9 more than the bottle,what is the value of the bottle? I am fat.I am pink.My mouth is long.My ears are big.My eyes are small.My tail is short.What am I英语智力测试