1. The prairie is topped _________(偶尔)by low hills.
2. He went to see his grandmother__________________(偶尔；有时).
3. They go swimming ____________________(每周三次).
4.Taiwan lies ________________(位于东部)China.
5. He could eat nothing ________________________(在……的最后)his life.
6. So if you want to know what it feels like to fall _____________________(失败, 成为泡影)。
7.They hung flags across the street _________________(两房子之间).
