根据内容提示完成句子.
1. Wang Peng felt more hopeful as he ______ ________ _______.
2. He did not look forward to _____ ______ ______ because his restaurant was no longer popular.
3. In recent years many of my friends have come to the big city to _______ ______ ______.
4. This produced a chain reaction, which _______ ______ _______ for life to develop.
5. Many millions of years later, the first extremely small plants began to appear _______ _______
_______ _________ the water.
