| 1. | The seven days of my stay had been of no use .
我停留七天也无济于事。 |
| 2. | We paid back the loans seven years earlier .
我们提前七年还清了贷款。 |
| 3. | The school day is divided into seven periods .
每个授课日分为七节课。 |
| 4. | Polyhedra with seven vertices are rare .
具有七个顶点的多面体是稀少的。 |
| 5. | But my father did not return at seven .
然而到了七点钟，父亲并没有回来。 |
| 6. | If you take five from twelve , you are left with seven .
十二减去五得七。 |
| 7. | Winston's flat was seven flights up .
温斯顿的住所在七层楼上。 |
| 8. | Everybody seems at sixes and sevens .
每个人都好象乱七八糟的。 |
| 9. | They battled heroically for seven days and nights .
他们英勇地战斗了7昼夜。 |
| 10. | He has sailed the seven seas in search of adventure ..
他航行七大洋去历险。 |
