---How do you like the food and service in our canteen?

---Much better than ______ used to be.

A．those                     B．one                        C．they                       D．that

Henry made a list of all the possible solutions,______ helpful in handling the present situation, though.

A．none of them                                             B．none of which

C．all of which                                               D．all of them

Never should we forget the war and sufferings ________ caused to the people.

A．it                                                             B．which

C．that                                                          D．what

The financial crisis(危机) and the suffering ________ has caused have a great influence on the whole world.

A．they                       B．it                           C．which                    D．what