---Would you like ________?

---Thank you, but I'm not thirsty．

---Sam, let's go to the zoo tomorrow.

---Sorry, I'm ________ tomorrow.

---Who's that?

---________.

---________ are my books?

---They are in your bag.

---________ is Ann's sister?

---She is in the classroom.

--I began to learn English half a year ago.

--I can speak ________ English now.

--- I'm going to Beijing for a holiday.

--- ________.

---________?

---We are going to Los Angeles．

---________ did it take to get there?

---About nine hours．