新概念英语第三册第1-8课测试题(共5页).doc

精选优质文档-倾情为你奉上新概念英语第三册第1-8课检测题一、单项选择（每小题1分，共20小题，共20分）1. _, it immediately ran away. A. Observing her B. Having been observed C. On being observed D. On her being observed2. The experts were now fully convinced that the animal _ a puma. A. must be B. should have been C. can only be D. could only have been3. A puma will not attack a human being unless it feels itself to be _. A. under cover B. in a corner C. at an angle