题目

The octopus( 章鱼) has been a little frightening to people for years. It seems like it could be from another planet, because the animal has eight slippery arms, each of which has its own kind of brain. It is very different from a person's brain.However, it turns out the sea creatures might be more like us than we thought. Scientists say that octopuses have been building cities underwater. Scientists have discovered that the so called gloomy (忧郁的，幽暗的) octopus”， whose scientific name is octopus tetricus, is not that gloomy and alone after all. In Jervis Bay, in eastern AustraJane studies chemistry ________ asking the teacher ________ help.A.for; byB.for; toC.by; byD.by; for