1.

Sarah invites Kumiko ...

   to have lunch together on Saturday.
   to have breakfast together on Sunday.

2.

Kumiko invites Sarah ...

   to have a Japanese-style lunch.
   to have a Japanese-style breakfast.

3.

What do Kumiko's family usually have for breakfast?

   Fish, meat, salad and green tea.
   Fish, rice, soup and green tea.
   Soup, rice, meat and green tea.

4.

Why does Sarah accept the invitation?

   Because she likes to try new things.
   Because she likes fish for breakfast.