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I back up all my data regularly.

You can back up another two feet or so.

I was prepared to back up her story because I knew it was the truth.

The writer doesn't back up his opinions with examples.

I was prepared to back up her story.

Put the car into reverse gear to back up.

I have all the evidence to back up my argument.

You missed the lines in the parking space. You'll have to back upand try again. If you don't believe me, talk to Dave. He'll back me up.

I won't be able to open the gate if the car doesn't back up.

back up your car

Could you back up a little so I can open this drawer.

Make sure you back up your files before you sell that computer.

You missed the lines in the parking space. You'll have to back up and try again.

You could back up your photos onto a CD-ROM.