【单选题】These shoes are too big. Ask the clerk to bring you a smaller ______.
【单选题】These shoes are too tight for me.
【单选题】If these shoes are too big for you,buy a smaller______.
【单选题】If these shoes are too big, ask the clerk to bring you a smaller______.
【简答题】PN结的单向导电性表现为_____时导通;_____时截止。
【单选题】These shoes are too small. You may buy some ____ shoes.
【单选题】单项选择。 These shoes are too small for me. Would you please show me pair? [ ]