1. 连词成句。

1. （1） you, did, see, stamp, the, letter, the, on
3. （2） showed, I, my, stamp, the class, to
5. （3） enjoyed, I, really, my, stamp
7. （4） I, English, when, make, often, I, mistakes, speak
9. （5） a, our, for, game, I, school, won