1.    ______ about wild plants that they decided to make a trip to Madagascar for further research.
　　A. So curious the couple was                           
　　B. So curious were the couple
　　C. How curious the couple were                       
　　D. The couple was such curious
　　2.    Judging from his manners at the party, he doesn’t seem ______ much education.
　　A. to receive                                                   
　　B. to be receiving
　　C. to have received                                          
　　D. to have been received
　　3.    They all returned to the village ______ that the danger was over.
　　A. convincing                                                 
　　B. convinced               
　　C. to convince                                                
　　D. having convinced
　　答案：1. B ；2. C； 3. B 。