—Do you mind my closing the door? It’s a little bit cold in here.
—___________.
| A．Go ahead | B．Yes, you do | C．Hold on | D．Come on |
I’ll never forget the most wonderful holiday ________ we stayed in the country with my grandparents.
| A．when | B．which |
| C．where | D．that |
At 13，Samuel received a training course in drawing for three years，________ he got a good opportunity for further development.
| A．after that | B．after which |
| C．after it | D．after this |
Her sister has become a lawyer，________ she wanted to be.
| A．who | B．that |
| C．what | D．which |
Let’s talk about the persons and the things ________ we can remember.
| A．which | B．whom |
| C．that | D．what |
So far all cloned animals have suffered from some different serious disorders，________ dying soon after birth.
| A．many of which | B．many of whom |
| C．many of them | D．many of that |