You can only be sure of ____ you have at present; you cannot be sure of something ____ you might get in the future.
—Would you like to go to Mike’s birthday party? —That depends onI am invited.
—What’s wrong with our VCD?—I don’t know. Let’s have ittomorrow.
The famous star got injured before her concert,made her fans worried.
It has been proved thathard leads to success.
The palace you visited yesterdayabout five hundred years ago.