通读下面短文，掌握其大意，然后按照句子结构的语法和上下文连贯的要求，从每题所给的四个选项中选出一个最佳答案。

Lingling is preparing for her trip to Los Angeles. She1a list of things for her trip. She likes to get things ready earlier, 2she doesn't know what to take. She asks Betty for help. Betty advises her to take notebooks，pens and3dictionary. Lingling is leaving4the end of July and she is going to stay there for four weeks. She will take some shorts or light trousers. The weather there will be sunny and hot，and she wants to buy a pair of sunglasses5leaving. Because Betty tells her that many things are6in America.7she travels by plane，her bag mustn't weigh too much. She'd better8the travel company about the total9for all her bags. And finally, the most important thing: do not forget10her passport.