12) Sally Ride was the first _______________(探索外部空间的美国妇女).
13) They lifted a rock _______________(结果砸了自己的脚).
14) He was surprised _______________(在这个山村遇见一个中学同学).
15) I am sorry _______________(占用了您这么多时间).
16) I happened _______________(在他冲进来的时候站在门口).
17) She doesn’t like ______________(被当作客人).
18) If you want to save money, you’d better _______________(到校园书店买旧书).
19) We did nothing _______________(除了整天打桥牌).
20) We were made _______________(进屋之前在垫子上擦擦脚).