六级练习2013.11.24 schools, sometimes, different, numbers, because

Rebecca949

Of course, hungry predators sometimes ignore the warning. They still go after the grasshopper. If that happens, (1)_______________________. It makes lots of foam. The foam tastes so bad that the predator won't do it again. (2)____________________________. They have different defenses that help them survive in the wild. Many fish live in groups or schools. That's because there is safety in numbers. At the first sign of trouble, (3)______________________. Then the school of fish makes lots of twists and turns. All that movement makes it hard for predators to see individuals in a large group.

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susan.sui

the grasshopper has a backup deffense
color doesn't offer enough protection for some other animals
schooling fish swim as close together as they can get

伊梦青依

the grasshopper has a backup to find