---When is ________ birthday?

---His birthday is November 11th.

---Is your birthday on April 5th?

---Yes, ________.

-________!Where's my pencil?

-________, I don't know．

“When will your school ________?”

“________.”

---Can I see your new pen? 

---________.

--- Will you go with us?

--- Yes, I will if ________.

—What do cows eat? 

—They eat__________ grass.

---Why do you come back so late? 

---Because there were too many people in the supermarket, and I had to _____to pay for the things.