—Sorry indeed, I ________ to your birthday party if …—Forget it. I know you were out on business.
Eleven people got killed in the accident, ________ the identities haven't been available.
It's said to be a case of murder ________ the children were used by adults.
Naturally a smile ________ the eyes participate is extremely communicative.
With hundreds of attractions, Beijing is a city ________ makes a lasting impression on its visitors.
Just use this room for the time being, and we'll offer you a larger one ________ it becomes available.