Complete each of the following 15 sentences with the most likely answer. Write the letter corresponding to your choice on the answer sheet. (1 point each, 15 points in all)

　　1. It is strange that such a thing ________in your company.

　　A. happen                                                        B. happens

　　C. happened                                                     D. has happened

　　2. She considered________ important that everything should be finished by ten.

　　A. that                                                             B. what

　　C. it                                                                 D. which

　　3. I was surprised that no one ________them of the danger.

　　A. warns                                                          B. warned

　　C. has warned                                                   D. had warned

　　4. Alice is going to the photographer’s this afternoon ________.

　　A. to have taken her photograph                         B. to have her photograph taken

　　C. to have her photograph being taken                D. to have her photograph been taken

　　5. The professor, ________whether anyone would come to help him, had to prepare for the experiment by himself.

　　A. did not know                                                B. having not known

　　C. had not known                                              D. not knowing

　　6. It was not until she arrived at the airport ________she realized she had forgotten her passport.

　　A. and                                                             B. when

　　C. where                                                          D. that

　　7. The promise of finding long-term technological solution ________the problem of world food safety seems difficult to fulfill.

　　A. to                                                                B. for

　　C. of                                                                D. at

　　8. It is difficult to predict what his ________to the result will be.

　　A. opinion                                                        B. reaction

　　C. view                                                            D. impression

　　9. To telephone him, you will have to ________his number in your phone book.

　　A. look to                                                        B. look up

　　C. look through                                                D. look at

　　10. At the level of primary education, the most important task is to________ children’s interest in nature.

　　A. stimulate                                                      B. enlarge

　　C. strengthen                                                    D. expand