See the flags on top of the building? That was _______ we did this morning.(2006年全国I高考题)
--- 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.