How long do you think ______ the Microsoft brings out a new product?
--- 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.
Last night, there were millions of people _______ the opening ceremony live on TV.