| A fort is a strong building with a high wall around it. It is a safe place________ | 1.________ |
| people can protect themselves. Long ago, there were many forts. Guards | |
| ________(站) in towers at the corners of the | 2.________ |
| wall. A________the outsides of the wall was a | 3.________ |
| manmade river. A bridge was let down________it | 4.________ |
| when people wanted to enter or l________the fort. | 5.________ |
| Can you guess who is building fort these days? Today the | |
| greatest n________of forts are built by children. | 6.________ |
| These forts are not built to keep enemies________. | 7.________ |
| It is a special and private place. A person can be | |
| ________(独自) in the fort. Only invited guests are | 8.________ |
| allowed in. Every kid who wants a special place can | |
| ________some kind of fort. A big cardboard box | 9.________ |
| makes a nice fort for one________two persons. | 10.________ |
