—Must we keep the window _______ all the time?
—No, you don’t have to.
| A．opening | B．opened | C．to open | D．Open |
I’ll never forget the days ______ I spent on the farm.
| A．when | B．that | C．in which | D．in that |
The artist ____ the judge gave a prize is the teacher _____ I have been taught painting for over three years.
| A．to whom; by whom | B．from whom; by whom |
| C．to whom; who | D．whom; who |
Can you lend me the book _____ the other day?
| A．about which you talked | B．which you talked |
| C．about that you talked | D．that you talked |
I’ll show you a store_____ you may buy all _____ you need.
| A．in which; / | B．which; that | C．that; that | D．where; which |
I meant to help him . ______， he didn’t accept my offer.
| A．But | B．As a result | C．Therefore | D．However |