Police in London have warned people to remain cautious following the bomb attacks during Thursday morning’’s rush hour on the city’’s transport system. The attacks are (36)________ to have killed at least fifty people and injured around seven hundred more. (37)________on television just hours after the attacks, the British Prime Minister, Tony Blair, promised an (38)________investigation by the police and security services to track down those (39)________. Mr. Blair also said he knew those behind the attacks had acted in the name of Islam but he (40)________that the overwhelming majority of Muslims abhorred (憎恨)the (41)________as much as he did. The first attack came just before nine in the morning on a train close to the main station in the city’’s financial (42)________; minutes later the worst incident occurred: a bomb (43)________ in a deep underground line, killing more than twenty people. (44)________________________ throwing debris (破片)onto a nearby track and involving a further two trains. The fourth explosion ripped the roof off a bus. (45)________________________, and (46)________________________