基本信息
module 4 unit 3 tomorrow’s world
一．词汇复习篇：
【单词】
1. upon reaching the top>到达顶峰时，观众心中将会涌起一种愉悦感和成就感。
on / upon + doing 一…就…（用以表示某一特定场合）
on entering the room, she saw him. 她一进这个房间便看到了他。
【拓展】
◆ in + doing 做…时，…发生时，当…时
in attempting to save the child from drowning, she nearly lost her life.
◆ after + doing 在…后
after winning the prize she became famous overnight.
◆ before + doing 在…之前
before going home, i must finish this letter.
