We wih to acknowledge receipt of your letter of March 1-找考题网

填空题We hope this unfortunate incident wil not afect the friendly relations（）us.

填空题If the first shipment is satisfactory,we can（）with you some repeat orders.

填空题Your immediate reply should reach us not later（）the end of this month.

填空题Please take the necessary steps（）delay.

We wih to acknowledge receipt of your letter of March 15,（）reached us yesterday.