International trade gives consumers and countries the opportunity to（） goods andservices not available in their own countries. 

Afterhavingseenthe（）andsamples，Jennymakesthespecificinquiry.

A.category
B.catalogue
C.calculation

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Thepaymentismadebyanirrevocable（）letterofcreditinourfavor.

A.light
B.bright
C.sight

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