一个梯形上底4厘米，下底6厘米。如果将上底延长2厘米，则这个梯形变成一个

____形；如果将上底缩短4厘米，则这个梯形变成一个____形。

人体的外出血可分为____ 、____ 和____ 三种，最常见的是____ ，特征是____ 最严重的是____ ，特征是____ 。

用所给词的适当形式填空

1. --How does John go to school?

   -He usually ____ (walk).

2. It's about ten ____  (kilometer) from my village the town(城镇).

 3. Jane's brother ____ (not take) the subway to school. He usually rides his bike.

 4. Wu Peng needs about twenty-five minutes ____  (get) to school every day.

 5. -How far do you live from your____ (grandparents) home?

   -About four kilometers.