Attached to this letter ______ a copy of B/L, along with copies of invoice and weight memo.

We invite your attention to the ______ that the L/C covering your order No.185 has not reached us in spite of our repeated requests.

If the amount exceeds that figure, payment ______ L/C will be required.

Please make sure that the terms and conditions in the L/C are exactly the ______ as those in our contract.

We are sure your help will be beneficial ______ both sides.

After receiving our request for payment extension, our supplier agreed to draw a new bill ______ us，with interest of 5% added for the extension.

I am sending you a check of $1,500 ______ full payment of my account.

We look forward ______ receiving your early reply.

We prefer your quotation ______ CIF San Francisco basis.

We cannot do business ______ your price is too high.