未知题型 6. In American university you can use your cell phone to play games or text in the class.

未知题型 【填空题】友人( )一人( )( )いな( )て、寂しいです。

单项选择题 A （ ） is a conditional written undertaking given by bank on the request of an importer to pay at sight or at determinable future date a certain amount of money to the exporter against stipulated documents. A、letter of creditB、telegraphic transferC、demand draftD、document against payment