写作。根据中文提示，写出内容完整、意思连贯、符合逻辑、不少于50词的短文。

       下面是一位美国中学生的来信。假设你是王英，请你写一封回信，解答他来信中提出的问题。（信的开头及结尾均已给出，不计入总词数。）

Dear Wang Ying,

        How are you? Summer holiday is coming soon. I'm going to the seaside for my holiday. But I don't like

to go there with my parents. I don't get on well with them because they are always trying to teach me. Do you

have the same problem? What about parents? How can we get on well with our parents?

        Hope to hear from you soon. 

                                                                                                                                           Yours, 

                                                                                                                                      David Smith  

Dear David,

        Thank you for your letter. I'm very well, thank you.

        For my summer holiday,                                                                                                                  

        Hope to hear from you again.

                                                                                                                                           Yours,

                                                                                                                                        Wang Ying      

女孩，4岁。近1个月先后出现两眼睑下垂，朝轻暮重。新斯的明试验阳性，诊断为重症肌无力。下列哪点是其最主要特点（）

A.骨骼肌无力经休息后好转

B.双眼睑下垂

C.眼内肌也常累及

D.可同时伴有呼吸困难和吞咽困难

E.眼外肌麻痹可引起复视