________ is known to all is that effective measures should be taken to deal with the problem of the overexploitation of our resources.
.Only when your identity has been checked ________.
The Southern States wanted to ______ the Union, so the American Civil War ______.
I had not been asked to the party, so I felt ______ and a bit hurt.
---But why ? He simply ignored my words.---He couldn’t have heard you. Look, he’s ________in the book.
I lost sight of Wang Ping when we reached _________ looked like a large market.