单项选择题

第二节 短文理解2
阅读短文，从各题所给的三个选项中选出可以填入空白处的最佳选项。

A 根据下面短文回答下列问题。 A bird was very thirsty (渴). He was looking for water. He saw a bottle and flew down happily. He saw some water in the bottle. But he could not get the water. "What can I do" thought the bird. He looked around and saw some pebbles (鹅卵石). Then he had a good idea. He dropped the pebbles into the bottle one by one. Now he could drink the water happily.

When the bird saw a bottle, he ______ in the bottle.