U1 Focus 填写每幅图对应的字母。 a. With this invention, the user can still use his hands and will not get wet in the rain. b.This protects the clothes and face and looks like a new fashion. c. You didn't get a seat on the train? With this invention you can sleep while you travel. d. You can communicate with friends all over the world with this invention. e .Bored? This invention can entertain you for hours. f. Your new shoes won't get wet with this invention. g. You will never have too much butter on your knife with this useful invention.