朝鲜熊猫送一只死一只:英语完型填空高手请进~

children are curious about the world around them. for example， they want to know ⑴ their hearts beat。 they want to know why the ocean water ⑵ salty。

⑶children grow up， they become curious about different kinds of things。 when they are babies，they are interested in the parts of their bodies and in the smiles of their mothers。 ⑷ they become interested in the physical world around them: the plants， the animals，the sky。 later， they become interested in the things ⑸ people have made： wheels， bicycles， cars。 and when they are adults，their curiosity ⑹。 sometimes this curiosity leads to a ⑺ in science。

scientists spend their lives ⑻ to find out about the world。⑼who work with the earth sciences study the earth， the oceans， and the skies。 ⑽scientists who study living things work with the biological sciences。 a third group of scientists study the physical sciences， e。g。 physics， chemistry。
⑴．[a]what [b]how [c]which [d]when
⑵．[a]feels [b]smells [c]tastes [d]looks
⑶．[a]as [b]since [c]as soon as [d]as long as
⑷．[a]so [b]even [c]thus [d]then
⑸．[a]that [b]whom [c]why [d]in which
⑹．[a]exists [b]stops [c]continues [d]decreases
⑺．[a]work [b]research [c]field [d]career
⑻．[a]try [b]to try [c]trying [d]tried
⑼．[a]that [b]this [c]those [d]these
⑽．[a]other [b]another [c]others [d]the other