单元：Module 01.txt

• man-made
• natural
• wonder
• discussion
• eastern
• though
• loud
• wow
• opinion
• in one's opinion
• more than
• electricity
• millions of
• below
• shine
• sign
• silent
• silver
• sky
• grey
• go through
• beside
• reply
• clear
• fall awa
• stream
• nearly
• on top of
• canyon
• remain
• by