⑳a tree in the distance\s\up7(21(21)-he was at least\s\up7(22(22)four metres tall.The men became afraid，and ran back to the boat.

They set sail again，and saw what looked like an exit\s\up7(23(23)，but it was blocked by rocks which had fallen down from the ceiling\s\up7(24(24).They made a bomb to blow up\s\up7(25(25)the rocks.After the bomb exploded，their boat rushed wildly forward into a large hole.The boat floated\s\up7(26(26)down with the water.It was too fast for them to escape\s\up7(27(27).They could only hold on to\s\up7(28(28)the boat in terror\s\up7(29(29).

Finally，they reached the bottom of the hole.Then the water began to push them up.They floated upwards\s\up7(30(30)for miles.The water rushed beneath them，pushing them out into the sunlight\s\up7(31(31).They now found themselves in a volcano in Italy-their adventure\s\up7(32(32)was over，but a new one was about to begin\s\up7(33(33).

阅读清障

①message n.(书面或口头上的)信息；消息

※he had recently bought是省略了在从句中作宾语的关系代词that或which的定语从句，修饰an old book。

②speak of谈及，提及　　③a trip to去......的旅行

④Iceland n.冰岛

⑤pack/pæk/vt.收拾(行李)，装箱；包装n.纸袋，纸盒；大背包；一群，一捆，一包

pack up打点行李；把......打包

※got his things packed是"get＋宾语＋宾补"结构，此处用过去分词作宾补。

⑥nephew/'nefjuː/n.侄子，外甥 niece侄女

⑦force sb to do sth强迫某人做某事

※现在分词短语forcing his nephew Axel to go with him作伴随状语。

⑧hire/'haIə(r)/vt.聘用，雇用；租用，租借

※过去分词短语named Hans作后置定语，修饰a guide。