—It's on May 1st.
⑴When is Tree Planting Day? A. Because we can have a party.
⑵Is it in September this year? B. May Day and Mother's Day.
⑶Why do you like Children's Day? C. It's on March 12th.
⑷What will you do for your dad? D. No, it isn't.
⑸What are the special days in May? E. I will make a cake for him.
—There are seven days in a week.
—________.
A. 这;这个 B. 数学 C. 爸爸 D. 第三 E. 那;那个