连词成句，注意所给的标点符号。
1. Think, I, pencil, it, his, is, (.)
____________________________________
2. know, you, do, how, him, (?)
____________________________________
3. boy, friend, the, your, is, (?)
_____________________________________
4. not, it, this, gold, ring, my, (.)
_____________________________________
5. in, the, that, your, and, lost, found, case, key, is, (?)
_____________________________________
