Firstly, Shining morning face means the children's face after washing their face at morning. And secondly, creeping like snail means the children's who can not move and unwilling to go to school. Just like snail...
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Answer:
They were expensive because people with special skills were needed to produce them.
Explanation:
The text doesn't say anything about the last two options, and not only wealthy people bought them. They weren't rare either.
You would have to tell us what the sketches are
I believe from what I see that every sentence has been turned from present tense to past tense. One example could be Number 5- Instead of, 'Peter is going to take the package later.", it could be in past tense, as in Peter already took the package- "Later, Peter took the package."
Hope this helped. Let me know if you have any more questions!