“Wecanassureyouthatourproductsareofthebestquality.”怎么翻译？

ThecreditofletterwillbeconfirmedbytheBankofChina,Shanghai,thatwill_______yourdraftonthedocumentsatsightfortheamountofyourinvoice.

____shipment,pleaseamendtheL/Ctoallowtransshipment.

Yourdelayinshipmentwill______usingreatdifficulty.

Wetaketheliberty____writingtoyouwithahopetogetyourbestoffersforChinesebicycles.