Question

1. His suggestion is        while developing economy is highly thought of by the government. (protect)

他的建议是政府在重视发展经济的同时我们要保护环境。

Answer 1

1. that we ( should) protect the environment suggestion后是表语从句，说明suggestion的内容。 suggestion后的从句谓语应用(should + ) 动词原形形式。