The young men walked _______ the forest(森林) and came to a big river at last.
— Kitty, do you know ______? — Sure, about forty minutes.
The teacher can _________believe that Tom studies so ________.
—When shall we go and play basketball? —Not until the work _____ tomorrow.
_____ John was watching TV, his wife was reading a book.
There’s _____ wrong with my computer. I’ll have it _____ .