unit 2 the olympic games ⅰ.单词拼写 1．several companies are________(竞争)for the contract. 2．there is a________(定时的)bus service. 3．i________(许诺)i'll keep it a secret. 4．he________(放回)the book on the shelf after reading it. 5．men especially love a________(便宜货)． 6．he worked in his spare time as a v________. in other words, he worked for free. 7．g________is the origin of the ancient olympic games.
