当我靠近小鸟准备捉住它时，它却飞快地跑掉了.

When I ________ ________ ________ the bird and was ready to catch it,it ________ ________ ________ me quickly.

请尽可能简单地把这事解释一下.

Please explain it ________ ________ ________ you can.

一方面他很机灵，但另一方面也很粗心.

On one hand,he is smart,but ________ ________ ________ ________,he is very careless.

许多国家所说的英语和英国所使用的语言一样.

English spoken in many countries ________ ________ ________ ________ the language used in Britain.

他很幽默，谈话中他总是引入一个新的话题.

He is very humorous and during his talk,he is always ________ ________ a new topic.

他总是睡得很晚；他喜欢熬夜.

He always goes to sleep late;he likes ________ ________.

会议以一首鼓舞人心的歌而结束.

The meeting ________ ________ ________ an encouraging song.

她把这个蓝毛衣换成了红的.

She ________ the blue sweater ________ a red one.

老师告诉我务必让学生们在讲这个屋子之前脱下鞋子.

The teacher asked me to ________ ________ that all the students ________ ________ their shoes before entering the room.

在什么情况下这种变化会发生？

________ ________ ________ will the change ________ ________?