Footsteps ___ his return.
Put __________ use in April 2000,the hotline was meant for residence reporting water and heating supply breakdowns.
I always dream of __________ to travel to different places, meeting different people.
Come and __________ your wet coat, or you will catch a cold.
The __________ of the Itaipu Dam took 30,000 people seven years.
__________ is possible that everyone will become happy if they change the habit of unhappiness.