The first textbooks written for teaching English as a foreign language ____ in the 16th century.
--- I wonder if I could pay the bill by check. --- ______. The card machine has just broken down.
Grandma pointed to the hospital and said, “That’s ______ I was born.”
Is this your necklace, Mary? I ______ it when I was cleaning the bathroom this morning.
_______ the forest park is far away, a lot of tourists visit it every year.