连词成句。

1. pouch,   a,   has,   a,   kangaroo

                                                                         .

2. lives,   a,   bird,   in,   tree,   a 

                                                                         .

3. to the,   read,   let's,   books,   go,   to,   library 

                                                                         .

4. different,   they,   a,   colour,   like 

                                                                         .

5. read,   books,   school,   work,   to,   is,   my,   favourite

                                                                                       .

用平面去截一个几何体，如果截面是圆，你能想象出原来的几何体可能是（     ）