50. If your uncle's sister is not your aunt, what relation is she to you? Your mother. 51. What is the difference between a monkey and a flea? A monkey can have fleas but a flea can't have monkeys. 52. What does everyone do at the same time? Grow old. 53. Who goes around all day in a car with his bag full of money? A bus conductor. 54. Which month has 28 days? Every month. 55. Where did the egg floating down the Mississippi River come from? From a hen. 56. Why do giraffes have long neck? Because their head are far from their bodies. 57. What number has nothing left if you take a half from it? 8. 58. What room has no doors, no windows, and no one to live in? A mushroom. 59. What time is it when the clock strikes sixteen? Time to have the clock repaired. 60. When do people have two mouths? When there are 2 people. 61. Who works only one day in a year but never gets fired? Santa Claus.
62. What has a mouth but never speaks? A jar. 63. If you had ten apples and ate eight, how many would you have? Ten. Two outside and eight inside. 64. A motorist ran into a motorcyclist, yet the motorcyclist was not hurt while the motorist was badly injured. Why? The motorist was walking. 65. My parents had a baby. It wasn't my brother or my sister. Who was it? Me. 66. Why do birds fly south? It is too far to walk. 67. What has teeth but never eats anything? A comb. 68. What do you have that others use far more often than you do? Your name. 69. What is both over and under the water but doesn't touch the water? A girl crossing a bridge with a pail of water on her head. 70. What has many a tooth but never a mouth? A saw. 71. What has cities but no houses, roads but no cars, and rivers but no water? A map. 72. What animal can jump as high as a tree? All. A tree never jumps. 73. With which hand do you write? Neither. I use a pencil. 74. What must you do before you return a book to the library? Borrow the book from the library.
75. What makes more noise than a pig? Two pigs. 76. What question can never be answered by "yes"? Are you asleep? 77. What goes on four legs in the morning, on two at noon, and on three in the evening? People. 78. Where can you always find money? In the dictionary. 79. Iron will rust（生锈）in the open. Then what if gold is put there? It'll be taken away. 80. When can you have sth. and nothing at the same time in your pocket? When there is a hole. 81. When a pregnant (怀孕的) woman got on a bus no one gave up his seat to her. Why? There are vacant seats on the bus. 82. Why do fish live in the water? Cats can't swim. 83. A little girl was 6 years old on her last birthday, and will be 8 on her next birthday. How can this be? It's her 7th birthday. 84. Why don't you advertise for your lost dog? The dog can't read. 85. What word is the first word on page 100 in your English-Chinese dictionary? An English word. 86. When can mother stop worrying about her vase? When it is broken.
87. What is full when it is used and empty when it is at rest? A shoe. 88. What is the best cure for insomnia? A good night's sleep. 89. How many great people have been born in America? None. Only babies are born there. 90. Where were you when the power was cut off? In the darkness. 91. When is a chain-smoker most painful? When he has a packet of cigarette but no light. 92. What is the biggest thing in the world? Eyelids. 93. What do we have in December that we never have in other months? D. 94．What letter is a kind of drink? T. 95．What has everyone seen before but will never be seen again? Yesterday. 96．What falls often but never gets hurt? Snow. 97. What does this mean – “IM2BZ2CU? I'm too busy to see you. 98. What does this mean – “ICU? I see you.