基本信息
【知识要点】defend/ guard/ protect
【诊断练习】用defend, guard, protect的适当形式填空。
①my brother is one of those who ____ our country at the boundary.
② measures should be taken to ____ the environment.
③there are two soldiers ____ at the gate.
2.【原句再现】within this huge country, there are frozen wastes, …
there are many wild animals in the forests and on the freezing, ice-covered lands … (p 2)
【知识要点】freezing / freeze /frozen的用法
【诊断练习】用freeze的适当形式填空
