单项选择题It's impossible for a child to do so much work within a short period of time, ______
单项选择题After a long discussion, they ______ an agreement.
单项选择题学生活动与交往的基本场所是( )。
单项选择题With the shining water before you and the wind, ______ trees behind you, you can not help ______.
单项选择题教科书能够对大多数学生和大多数学校都适用,这体现了教科书的______。