A:内的所有直线与异面
B:内存在唯一的直线与平行
C:内不存在与平行的直线
D:内的直线都与____ C. She's tired.
⑷How old are you? ____ D. I am tired.
⑸What can you do? ____ E. I am eleven years old.
⑹How does Kitty feel?____ F. He's tired.