---May I smoke here?
--- If you ________, choose a seat near the window.
| A．should | B．could | C．may | D．must |
She is pleased with what you have given him and ________ you have told him.
| A．that | B．which | C．all what | D．all that |
We gave him ________ help we could.
| A．which | B．what | C．that | D．this |
_______ surprised me most was ________ such a little boy of seven could play the violin so well.
| A．That...what | B．What...that | C．That...which | D．What...which |
Mary: Helen is a mere washer woman, yet she's now buying a big house.
Carol: Yes. Because she's always saved ________.
| A．what little she earns | B．how little she earns |
| C．for little she earns | D．with little she earns |
Output is now six times ________ it was before liberation.
| A．that | B．which | C．what | D．of which |