Ⅰ.单词拼写
1．The architect (建筑师) showed us the house design that she had drawn up.
2．The Natural History Museum is a superb (极好的) place for kids.
3．The study of the brain is often described as the next intellectual frontier (前沿)．
4．What's the formula for converting (使转换) pounds into kilograms?
5．The castle was built on top of a natural grassy mound (土堆)．
6．Plants absorb carbon dioxide (二氧化物) from the air and moisture from the soil.
