it rain tomorrow, we would have to call off the hike.

This printer is of good quality. If it _______ break down within the first year, we would repair it at our expense.

_____ my advice, you would not be in such a terrible situation now．

But for their help, we ______ the program in time.

 ---Be careful! Your clothes will catch fire.  ---Thank you._______ so close to the fire.