第一节 单项填空

从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。

How the fire in the hotel started ______ a mystery.

A．To give some good advice about how to reduce computer system unsteadiness.
B．To stop people from buying no-name products.
C．To advertise the advantages of name-brand hardware.
D．To make known the unsteadiness of computer systems.

A．some things
B．anything
C．things
D．nothing