A.faulty building construction
B.an earthquake's strength
C.widespread panic in earthquakes
D.ineffective instruments
A.faulty building construction
B.poor building sites
C.narrow streets
D.panic
A.construct strong buildings
B.put forward proposals
C.detect disastrous earthquakes
D.monitor earthquakes
A.notice them out at sea
B.find ways to stop them
C.be warned early enough
D.develop warning systems