—Excuse me, where is Mr Brown’s office? —Sorry, I don’t know. I ______ here for only a few days. A. work B. worked C. have worked D. will work 答案:C根据图回答问题(1)C羊是________ ,在实验中的作用是________. (2)A羊是在实验中提供了________. (3)B羊在实验中提供了________ , 它的作用是________. (4)克隆出的小羊更像________ , 因为________.