I. Complete the following sentences with the correct given words in the box.

   Why     more     matter     at     How much

1. Dr. Lai smiles ________________ Minh and tells him not to worry.

2. Before, there were 2 eggs. Now, there are ________________ eggs (10 eggs).

3. ________________ is the green dress? – It’s 30,000 dong.

4. She looks tired. What’s the ________________ with her?

5. ________________ does his tooth hurt? - Because he has a cavity.