—      is the zoo from the bus stop?    — It’s about 10 minutes’ walk .

Without Mr. Wang’s advice, I would not succeed in finishing the model plane. 

 — Do you think yesterday’s math problem was difficult?— Yes, but            I worked it out.

---______ is it from your home to the radio station?---About three kilometers.

------         did your brother improve his maths?     ------- By reading more.