--- Can you tell me ______ it is from here to downtown?

--- Yes, it's fifteen minutes by bus.

--- Dad, how can I get on well with my classmates?

--- Try to be friendly to them． That will make it much _________．

---________ books are there on the desk?

---There are four.

---________ are they doing?

---They are ________．

---________ is the spring?

---From March to May．

---“Where's John, Bob?”

---“He ________, Mr White.”