[单选题]for payment． we require an irrevocable L/C______sight against presentation of full set of documents to the negotiating bank here.

正确答案 ：A

at,

[单选题]____ please find a catalogue for our electric mixers, together with _____ specifications.

正确答案 ：B

Enclosed, detailed

[单选题]We are pleased to say that weare（）to supply you（）the goods you want.

正确答案 ：C

in aposition，with

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