4. 由于越来越多的森林遭到破坏，一些动植物正面临着灭绝的危险。(用with+宾语+补语结构, damage)

With___________________________________________________, some animals and plants are ____________

_________________________________________________________________________.

3. 当谈到教育，大部分人认为其是一个终生的学习。(the majority of)

When it _____________________________,

_____________________________________________ education is a lifetime study.

2. 一些有经验教师指出及时复习所学的知识直接有助于卓有成效的学习。(point out, contribute to, efficient learning)

______________________________________ reviewing what we have learned in time _____________________________________________________________________.

1. 不言而喻的是，网络作为一种新的学习工具在这个科技时代发挥着重要作用。(as, role)

It ________________________________ the Internet _______________________________________________

_______________________________________ in this era of technology.