1.

What do we learn about the eruption of Krakatoa?

D.    Most of the island where the volcano had been disappeared.

2.

Why did the visitors approach Anak Krakatau by night?

A.    They were not supposed to be there.

3.

When the visitors reached the summit, they ...

D.    thought about what had happened in the 1883 eruption.

4.

Which of these phrases is understood between 'but' and 'discovered'?
(paragraph 4, last sentence)

B.    what he then

5.

What impression of the sea do we get from the extract?

C.    It's better not to sail on it.

6.

The writer calls the waters 'haunted' because...

B.    many people died there.