With the country’s population reaching 1.6 billion in the mid of this century, most of China’s rivers, including the Yellow River, ________.

— Have you graduated from collage?— Yes, ________.

This ______ my first lime standing in front of so many people, I can’t help sweating．

Jim         a skilled worker for almost six years. He is an experienced manager now.

He looked as if he ­­­_____ the answer.