explore; specime; species; assume;giant;observe; elusive; landmark; vital; impact; alien; array; overlook; gear; hostile; on the heels of; from the beginning; for the first time; learn about; feed on; fit together; fit into 1. Autumn has arrived here_______a hot summer with unexpected speed.2. As a diplomat, he has witnessed the birth of the new nation and is well placed to ______ its growth during this critical period of its history.3. When you make travel plans, you’d better _____ that every flight can be late.4. “I have made it quite clear_______that I want to be part of the team,” John said.5.When Alice first came to the country, she was shocked by the way of life there that was totally _____ to her and the ______ environment where local people looked at her with a suspicious (怀疑的) eye.