It has been announced that candidates remainin their seats until all the papers have been collected

________ in the queue for half an hour, Tom suddenly realized that he had left his wallet at home.

How long have you lived in this village 一 I was ten years old.

He has been caught _________ the rain and is wet _________ the skin

From the ______ expression on his face we can guess something ______ must have happened to him.