See these ,what should we do?这句话对吗?

See these ,what should we do?这句话对吗?

口语不算错,书面语是不妥的.可以改为：
1.When we see these,what should we do?
2.Seeing these,what should we do?

不对，句首动词要写动名词

what should we do when we seeing these