14.In earthquake-affected countries, light building materials are used because _____. A: people there can move more easily B: the houses won't hurt people in an earthquake C: less damage will be caused in an earthquake D: people will not be affected by the earthquake

Under the same site category and intensity conditions, the seismic damage of steel structure building is greater than that of reinforced concrete structure building.

The fire has destroyed the house. The house ________________ by the fire. A: has been destroyed B: was being destroyed C: is destroyed

Choose the correct words or phrases to complete the sentences. The Great Fire of 1906 in San Francisco was ____ by the worst earthquake in U.S. history, estimated to measure 8.3 on the Richter Scale. To make matters worse, the earthquake caused the enormous fire, which actually caused more damage to the City than did the earthquake.

All the schools ______ because of the earthquake, students and teachers had to go back home. A: [A] having destroyed B: [B] were destroyed C: [C] having been destroyed D: [D] have been destroyed