基本句子结构：
S + LV + SC
容易见到系动词有： be, seem, appear, look, remain, sound, feel, smell, taste, become, grow, turn, go, prove, etc.
S + LV + N
1. _____________________ is one of mans greatest ___________________.
生物多样化是人类最大的财富。
2. ____________________________ of the Internet is an appropriate ________________ of the government.
对网络的立法管理是政府的职能。
3. The legalization of marijuana ____________________________ in our community.
大麻合法化在大家社区成了个焦点话题。
4. The greatest contribution of ____________ is the healthy attitude to life it encourages.
男女共校规范的最大优点是它所倡导的健康的生活态度。
5. One merit of the Internet is ___________________ the latest information.
网络有哪些好处是能飞速便捷地获得最新的资讯。
答案：
1. Biopersity, assets
2. Legislative1 regulation, function
3. has become a hot-button issue
4. coeducation
5. easy access to
