Lesson 16
Ⅰ、1、up and down
2、protect
3、Wait a minute
4、isn't it
Ⅱ、I wanted to give him some books.
2、I don't have any food today.
3、There is a fierce animal coming.
4、They walk over to me.
III、BDCA
IV、CABDB
Lesson17
Ⅰ、BAACCD
Ⅱ、1、courage 2、volunteers 3、symbol
4、dropped 5、reason(s) 6、killed
7、century 8、brave
Ⅲ、CABBD
.
Lesson 18
Ⅰ、CABA
Ⅱ、1、stay/keep healthy
2、used to
3、Real friendship
4、warned
5、relationship
6、touched my heart
Ⅲ、BAECD
Ⅳ、BCDDC ABCAD