开头用语
① I am writing to inquire about the details of the trip to Tibet.
② I wonder if you have made any definite plan for the coming summer vocation.
③ The news of your sorrow has just reached me.
④ I am sorry to hear that you have been ill for days and hope you have got better now.
结束用语
① I shall feel obliged if you will favor me with a call at your earliest convenience.
② I am looking forward to your reply.
③ I shall be grateful if you will take necessary measures to trace and recover it.