Unit 2 Cloning Ⅰ.单项填空1．—What are those on the________？—The________ that have fallen off the big trees.A．roofs；leavesB．rooves；leavesC．roofs；leafsD．rooves；leafs2．She always differs________ me________ how to spend the vacation.A．on；withB．with；onC．at；withD．from；in3．He undertook________ the working conditions.A．improvingB．being improvedC．to improveD ． to be improved4 ． Tom ， Jack and Rose were named as assistant professors.Believe it or not，________ three of them were of ________ age.A．/；anB．/；theC．the；anD．the；the5 ． I was about to give up my effort to work on the puzzle when a good idea________ me.A．beatB．struckC．attackedD．caught6．—Mom，may I play the computer games for a while?—________！Dad is in the study.A．Help yourselfB．It’s up to youC．Behave yourselfD．Go ahead7．Our school forbids________，that is to say，we are not allowed________ at school.A．to smoke；to smokeB．students’ smoking；smokingC．students to smoke；smokingD．students’ smoking；to smoke8．I have some________ with Japanese，but I don’t speak it fluently.A．resistanceB．acknowledgementC．acquaintanceD．access9．Li Ming won the first prize in the English speech contest and I’m glad that his efforts at last________.A．paid offB．worked outC．got backD．turned out10．She was________ by her husband’s sudden death and loss of her pet dog.A．cast downB．cast awayC．cast offD．cast aside11．We really________ you a great deal for all your hard work this year.A．costB．payC．oweD．offer12．The child is much too young；I object________ him alone at home.A．to leavingB．leavingC．to leaveD．leave13．—How I wish I had studied harder when I was in senior school!—If you had，you________ a university student now.A．areB．would beC．shouldD．were114 ． Profess...
