【正确答案】Dear Sirs,
   We have received with thanks your offer dated June 1．We are pleased that you have sufficient stock to make immediate delivery but we are surprised that you still demand that payment by draft at sight under irrevocable L/C.
   After several years of satisfactory trading with you, we feel that we are entitled to easier terms．Most of our suppliers are drawing on us at 30 days after sight, documents against acceptance (D/A), and we shall be grateful if you can grant us the same terms.
   Yours faithfully，