I used to be a naughty boy and my mother used to be angry with me. Now I’d like to say I’ve changed a lot. In fact， tha......

My grandfather on my mother’s side is a cancer patient. He was in hospital last week for his high fever.　　My grandfat......

“It is a hobby of mine to have an exact knowledge of London.”—Sherlock Holmes， The Red-Headed League1　　London is the......

Before dying at the age of 39， Blaise Pascal made huge contributions to both physics and mathematics， notably in fluids， ge......