Read and write. （按要求改写下列句子）1. Tom is twelve.（就画线部分提问）
is Tom?
2. We can see two boys in the picture.（改为一般疑问句）
you ____ two boys in the picture?
3. She is a girl.（改为复数）
They ____ .
4. I'm mending a clock.（就画线部分提问）

5. It's time to go to school. （改为同义句）
It's time ____ _ . 1. How, old 2. Can, see 3. are, girls 4. What, doing 5. for, school