Dear,
① I am very......to know that ...(写信的原因)②I am looking forward to...(表示欢迎拿罩颂)
③消郑I am afraid that......(表述建议理由)④ I would like to suggest that first......then....(给出建议)
⑤I believe this kind of arrangement will......(该建议的闷罩好处)
⑥moreover,if......(补充建议)