Can I make a raised bed garden with cinder blocks?

Image by BreadnBadger
Gardening Day 1 was spent making this raised bed, and prepping the area for planting. It’s not directly in front of our apartment, but it’s a great spot for sun, and it’s well off the street.

Question by David M: Can I make a raised bed garden with cinder blocks?
Concrete leaches alkali material when it gets wet. Do I need to take any precautions in order to grow vegetables (tomato, pepper, bean) to keep the soil pH from getting too high?

Can you help? Leave your own answer in the comments!