stuff going on

The Lettuce is beginning to bolt. Something is eating my young Tomato plants- chomped down to a bare stem in the morning, just like first happened to the sunflowers. I've put three of the volunteers in the empty spots, and covered them all. Cloches removed during day and finally for good from the G Beans and Cucumbers- the cukes remain untouched, the G Beans don't look well. I still don't know what's eating them, and the leaves are not a good color.