— I phoned you yesterday morning. A girl answered, but I didn’t recognize the voice.
— Oh, it __________ my younger sister. She was in my room at that moment.
| A．must have been | B．should have been |
| C．could have been | D．may have been |
____ seems strange to us is ______ she can sing so many English songs beautifully.
| A．It; that | B．That; how | C．It; Why | D．What; that |
My parents used _____ they had to get a new car for my brother.
| A．what | B．which | C．all what | D．不填 |
The question came up at the meeting _____ we had not enough money to do the research.
| A．whether | B．if | C．that | D．what |
Is this hotel _____ you said we were to stay in your letter?
| A．where | B．which | C．in that | D．in which |
A modern university has been set up in ______ used to be.
| A．which | B．that | C．what | D．where |