Pumas are large, cat-like animals which are found in America. When reports came into London Zoo that a wild puma had been     1     (find) 45 miles south of London, they were not taken     2     (serious) by experts from the zoo until enough evidence     3     (be) collected. The     4     (describe) given by people claiming (声称) to have seen the puma were similar. A woman     5     (pick) blackberries said she saw “a large cat”. And a businessman     6     a fishing trip also said he saw the puma up a tree. The experts fully     7     (believe) that the animal was a puma     8     was probably owned by a private collector. The hunt went on for several     9     (week) but no one could catch it.     10     is disturbing to think that a dangerous wild animal is still at large in the quiet countryside.

When the Titanic was built, people assumed it would never sink. So,     1     it sank on its first journey, the news surprised everyone greatly. The Titanic was built in Belfast, Ireland. Its makers spent a great deal of money     2    (build) the extraordinary ship. When it was finished, it was the     3     (large) and most comfortable ship ever built.

The Titanic set sail on 10 April 1912. “I had wanted to set foot on the Titanic ever since it was built,” said Molly Brown, a Titanic     4    (survive). “I never imagined it would sink！” On 13 April, the Titanic was sailing     5     full speed towards New York. The captain,     6     had received warnings about icebergs all day, had dismissed the warnings as they arrived. At 2.20 a. m.，the Titanic sank into the sea. It had hit     7     iceberg just over two hours before. Of the 2,208 people aboard the ship, only 705 survived.

Explorer Robert Ballard     8    (search) for the Titanic for more than 20 years before he found it. “When new technology was developed, we used it to send     9    (camera) down into the sea.     10    (final),we found the ship.”With the cameras, he was able to find the hole along the side of the ship which had caused it to fill with water and sink.