1.

Two dams in Brazil collapsed after weeks of torrential rain.

result

Two dams in Brazil collapsed as a result of weeks of torrential rain.

As a result of weeks of torrential rain two dams in Brazil collapsed.

The result of weeks of torrential rain in Brazil was that two dams collapsed.

2.

Such events raise again the question of dam safety in Britain.

bring

Such events bring up again the question of dam safety in Britain.

3.

The Reservoirs Act, 1975, is still to be implemented.

effect

The Reservoirs Act, 1975, is still to be put into effect.

4.

Most dam failures occur soon after construction or after a long uneventful period of operation.

place

Most dam failures take place soon after construction or after a long uneventful period of operation.

5.

The new Act places enforcement of its legislation in the hands of 66 local authorities.

responsible

The new Act makes 66 local authorities responsible for enforcement of its legislation.

66 local authorities have been made responsible for enforcement of its legislation by the new Act.

6.

Local authorities do not always fulfil the dictates of Parliament.

carry

Local authorities do not always carry out (carry through) the dictates of Parliament.