Putin will run for president next March in an election that could open the way for him to stay in ______ for 12 more years.

 They were trying to remove harmful ______ from cigarettes.

.The soldiers had worked for a long time.They ___ become tired and hungry, but ___ of them would stop to take a rest.

 There existed an obvious________ between the accounts of the witnesses, so a judgment was not announced in court.

There is a 20 minute parking _____ here, so we must get back to the car very quickly.