题目选项分析

To prepare for a major earthquake that is predicted to hit the state, the California Office of Emergency Services is building a satellite-based computer network that will identify earthquake damage and to pinpoint the most affected areas within two hours of the event.

In preparing for a major earthquake that is predicted to hit the state, the California Office of Emergency Services is building a satellite-based computer network to identify earthquake damage and to pinpoint the most affected areas within two hours of the event.