题目

This computer_______. It hasn’t worked for several months. A. didn’t work                                                                      B. wasn’t working         C. doesn’t work                                                            D. isn’t working20．育才文学社的38名同学租船游玩．大船每条15元，限乘7人；小船每条10元，限乘4人．怎样租船最省钱？至少需要多少元？