It takes about 10 minutes to walk and 5 minutes by bus.

題目：

It takes about 10 minutes to walk and 5 minutes by bus.
這裡用的固定短語是It takes sb some time to do stn.
是不是應該在by bus.前加 to

解答：

It takes about 10 minutes to walk and 5 minutes by bus.
這句話沒錯.固定短語是It takes sb some time to do stn.也沒錯.
但是,by bus.前不能加 to ,因爲by bus不是動詞.