Great changes _________ in China in the last two decades.
For a long time they walked without saying _____ word. John was the first to break _____ silence.
Readers have been making good comments on the book, but _____ actual sales, it is still far from satisfactory.
—Which is the computer you want to _____?—The one over there.
Don’t start reading a book _____ you find that it’s one you can read with ease and understanding.
Someone _____ his car in front of my house and it’s blocking my way.