英语作文万能模版范例（一）倡议信Directions:Hospitals throughout China are faced with blood shortage and a great many patients lives, therefore, are threatened. Write a proposal letter to 1) concern for the problem2) call on them to be blood donorsDear Schoolmates,A severe shortage of blood is afflicting Chinas hospitals and numerous blood banks have reported dangerously low supplies. Because of recent acute blood shortage, many vital operations have to be postponed, which reduces a large number of patients to bleak despair.What can we do to relieve the blood shortage and save these pitiful patients? The best solution should be rolling up our sleeves to donate blood. Being a blood donor wont harm our own health, so I hope all of us can actively and voluntarily participate in blood donation. Yours sincerely, Li Ming