精选优质文档-倾情为你奉上Unit 1 Ways of Learning Part I. Vocabulary & Structure1. To use the machine, first_the correct coins, then select the drink you want and press the button. A. inside B. insert C. concert D. insist 2. _, it was the wrong time to open a new data processing center in his city.A. In retrospect B. In due course C. In service D. In need 3. The little girl did _ seem to be _frightened of being left by hers