As is known to us all, under no circumstances______ temporary economic development at the expense of the environment and resources.

In no case _______ go _______ the law of nature or we’ll meet endless suffering．

All the books are not useful. Which of the following has the same meaning as this sentence?

I have been living in the United States for twenty years,but seldom _______ so lonely as now.

“I hear Johnson was badly injured in the accident.”“_____ ,let’s go and see him.”