----Have you seen _____ pen? I left it here this morning.----Is it ____ black one? I think I saw it somewhere.
— Where is my English book? — I brought it to you _____you were in hospital yesterday afternoon.
The nutrients in _____falls into the ocean quickly become available to other living creatures.
Don’t forget where the emergency exits are _____an emergency.
The lake is calm and clear, and one of the things that _____in the water is the famous tower.
The roommates have lived for three years and not once _____with each other.