完形填空。 Mark Twain was a pen name of Samuel Langhorne Clemens. He was born on November30, 1835, in a small town in Florida, the USA. He 1 a few naughty boys who later 2 in his stories. At the age of 12, his father died, and he began to work, first as a printer, then on a river boat. Those years on the boat went into his book 'Life 3 the Mississipi. (密西西比河)' 4 the Civil War (国内战争) he worked as a reporter and used Mark Twain as his pen name. The stories he wrote in this period 5 him famous and popular. He made a lot of money by writing, lecturing and running 6 publishing house. But he spent all of it on high living and 7 business. Mark Twain 8 as a 'funny man'. But in fact he took a serious view of life. Many sad things happened in his own life. All his 9 helped to shape (形成) his stories 10 showed the dark side of society. He died as an old man of 75 in 1910. (     )1.A.grew (     )2.A.turned (     )3.A.on (     )4.A.While (     )5.A.made (     )6.A.him (     )7.A.success (     )8.A.knew (     )9.A.challenges (     )0.A.who B.grew up B.became B.in B.During B.kept B.himself B.successful B.was known B.experienced B.where C.grew up with C.appeared C.at C.For C.served C.his C.successfully C.was knowing C.happiness C.which D.grew up in D.disappeared D.for D.Since D.encouraged D.his own D.unsuccessful D.was to be known D.sadness D.in which