Almost everyone has a dream job, and for Susan, it is being a whale （鲸） trainer at her city's aquarium（水族馆）. Last year, Susan had a chance（机会）. If Susan wanted the 1 , she had to take part in a competition. They need to show how 2 they could go down into the seven-metre-deep pool and how long they could stay there. The one who could reach the deepest and stay the longest underwater would get the job.
Everything went 3 at first. But then, as Susan went down about five metres under the icy water, her legs stopped 4 . The cold water caused a huge pain （疼痛）in her legs. She couldn't swim back to the surface（表面）. She was in great fear and couldn't think. This only made her 5 farther into the pool. Just as Susan 6 hope, she suddenly felt herself being pushed to the surface.
It was Mila, a whale in the pool. She noticed Susan's 7 , held her leg in her mouth and pushed Susan up to the surface. Susan was 8 , thanks to Mila's quick action. The aquarium spokesperson said Susan was really 9 , because Mila had realized Susan needed help before any of the working group did, which saved valuable time.
Whales are social animals — 10 live and play together. In the wild, they show great interest in humans and often swim close to boats and divers.
