1.Radio was invented about a hundred years by Marconi                                                                      2.We wish our teacher could here at the moment                                                                    3.Food weren't sold on the sidewalk                      4.I wish I could understand this problem              5.A new bridge are being built in this city           6. They have been started learning                     7.This sang can be sung                                         8.I used to get up early                                             9.Lan wish she had a sister                                     10.He has begun preparing his report for five day                                                                              11.The exercise can be done at home                  12.He wishes he could drive a car                        13.We used to walk to school last year                14.Her hat is founded on the shelf                        15. She has been taken to the theatre by her brother                                                                    16.I wish I could know her phone number