1、答题要领：

  (1)specifically reveal which transportation is the most efficient.

  (2)ideally include two reasons for your answer.

  2、观点提示：

  (1)train

    1)It can accommodate a lot of people each travel.

    2)It travels really fast, for example it only takes ... hours from ... to ...

    3)It is a safe choice for travelling.

  (2)subway

    1)fast and safe. no traffic jam.

    2)It almost reaches everywhere of the city, so it's very convenient.

  3、模板：

  (1) The most efficient transportation in my country is ...

  (2) There are a couple of reasons for this.

  (3) First, ...

  (4) Second, ...