先通读下面的短文，掌握其大意，然后从A、B、C、D四个选项中选择可以填入空白处的最佳答案。

Hi Lily,

    How are you?Thanks for your last e-mail．You want to1about my school clubs，right?Well,it's time for my friends and I to2the school clubs now．There are many clubs in my school，3the English club，the art club，the music club and the sports club．I have two good4，Jack and Lisa．We all want to join the school clubs．

    I want to join the5club，because I can play the guitar．I6speak English well，but I also want to join the English club．Jack likes sports．7can play soccer and basketball．He wants to join the sports club．He can play the guitar,too．8he doesn't want to join the music club．Lisa likes9．She wants to join the art club．She also speaks English very well．I think she can be in the10club．

    Are there many clubs in your school?What club are you in?

    Please write to me．

Yours．

Lucy

在草→蝗虫→青蛙组成的食物链中，若青蛙的体重增加10克，则最少需消耗蝗虫（    ）

下列词语中，划线的字每对读音都不相同的一组是（　　）

一凸透镜的焦距是8cm，当物体距焦点5cm时，则物体的成像情况是    (    )