How could you be so rude as to walk in here in the middleof my class—_____________

下列各句中，没有语病的一句是（ ）

She __ _on the desk all the books she was carrying and ____ down for a rest.[ ]

Saying that is just like ______ fuel ______ the fire.[ ]

The computer system____ suddenly while he was searching for information on the Internet.