完成句子。

1. The city was _________ __________ (成为废墟) after the earthquake.

2. At that time many readers __________ __________ of (对…评价不高) his works.

3. The woman was ____________ ___________ (说服) buying some clothes that she didn't need.

4. Four plus three is __________ __________ (等于) seven.

5. My father __________ all his life __________ (致力于) the protection of environment.

《中华人民共和国可持续发展国家报告》提出推行开源节流并重的方针，把( )放在突出位置。

A．节煤

B．节水

C．节电

D．节地