完形填空。 I recently heard a story about a famous scientist who had made several very important medical breakthroughs.He was being interviewed by a reporter who asked him __ 1 __ he thought he was able to be so much more __ 2 __ than the average person. He __ 3 __ that it all came from a(n)__ 4 __ with his mother that occurred when he was about 2.He had been trying to remove milk from the fridge when he __ 5 __ the slippery (光滑的) bottle，its contents running all over the kitchen floor. When his mother came in，__ 6 __ shouting at him or giving him a lecture，she said， “Robert，what a great and wonderful __ 7 __ you have made! I have __ 8 __ seen such a huge pool of milk.Well，the damage has already been __ 9 __.Would you like to get down and __ 10 __ in the milk for a few minutes before we clean it up？”Indeed，he did.After a few minutes，his mother said，“Robert，whenever you make a mess like this，eventually you have to __ 11 __ everything to its proper order.So，how would you like to do that? We could use a sponge(海绵)，a towel or a mop.Which do you prefer？” He chose the sponge. His mother then said，“You know，what we have here is a __ 12 __ experiment in how to effectively carry a big milk bottle with two __ 13 __ hands.Let's go out in the back yard and fill the bottle with water and see if you can make it.” The little boy learned that if he __ 14 __ the bottle at the top near the lip with both hands，he could carry it without dropping it.What a wonderful __ 15 __！ This scientist then remarked that it was at that moment that he knew he didn't need to be __ 16 __to make mistakes.Instead，he learned that mistakes were just __ 17 __ for learning something new，which is，__ 18 __，what scientific experiments are all about. Even if the experiment “doesn't__ 19 __，” we usually learn something __ 20 __ from it. (     )1．A.why (     )2．A.capable (     )3．A.responded (     )4．A.coincidence (     )5．A.fell (     )6．A.rather than (     )7．A.picture (     )8．A.rarely (     )9．A.obtained (     )10．A.jump (     )11．A.recover (     )12．A.failed (     )13．A.strong (     )14．A.controlled (     )15．A.example (     )16．A.anxious (     )17．A.situations (     )18．A.after all (     )19．A.do (     )20．A.worthy B．what B．able B．reacted B．experience B．lost B．instead of B．mass B．happily B．suffered B．play B．return B．successful B．tiny B．possessed B．teaching B．nervous B．opportunities B．above all B．finish B．costly C．when C．creative C．recalled C．matter C．escaped C．other than C．map C．frequently C．done C．enjoy C．restore C．fantastic C．thin C．seized C．lesson C．fearful C．occasions C．first of all C．go C．valuable D．how D．original D．reminded D．conflict D．dropped D．in place of D．mess D．angrily D．received D．draw D．regain D．painful D．weak D．grasped D．instruction D．afraid D．turns D．in all D．work D．interesting