— I’m terribly sorry to keep you waiting for so long.
— _______.
| A．Never mind. | B．That’s right. | C．You are welcome. | D．Don’t mention it. |
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 |
"Why did you go to the wrong class, Mr. Wang "
"Well, I forget _______ I was supposed to go to."
| A．which the room | B．which room |
| C．what was the room | D．what room was it |