We were just about ready to leave _____ it started to snow.
The policeman said the accident was __________ careless driving. Therefore, the driver had to pay for all the losses.
__________ their timely help, we overcame the difficulties at last.
Eating too much fat can __________ heart disease I and cause high blood pressure.
The river near our school has become clean again as new measures have been __________ to prevent it __________ any further.
In some countries packets of cigarettes come with a government health warning __________ to them.