He made clear to his workmates that he would leave the company.
| A．it | B．that | C．them | D．this |
Eleven people got killed in the accident, ________ the identities haven't been available.
| A．whose | B．of whom |
| C．to whom | D．with whom |
It's said to be a case of murder ________ the children were used by adults.
| A．when | B．where |
| C．which | D．that |
Naturally a smile ________ the eyes participate is extremely communicative.
| A．to which | B．in which |
| C．at which | D．with which |
With hundreds of attractions, Beijing is a city ________ makes a lasting impression on its visitors.
| A．which | B．where |
| C．what | D．when |
Just use this room for the time being, and we'll offer you a larger one ________ it becomes available.
| A．as soon as | B．unless |
| C．as far as | D．until |