[单项选择题] We are in receipt of your letter of 1 st September, in forming us of the establishment of yo
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[单项选择题] We are in receipt of your letter of 1 st September, in forming us of the establishment of your L/C No. 894 ______ our S/C No. 90US9094.
A.against
B.under
C.covered
D.on
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