| A | B |
|---|
| engineer | a person trained to design and build structures |
| superstructure | the part of a building that rises above the basement |
| bedrock | the solid layer of rock that lies deep beneath the soil |
| cranes | large machines used for lifting heavy objects |
| contractor | a person whose job is to make sure workers and supplies are at a building site |
| hoists | machines used to raise objects |
| exterior | the outer part of something |
| interior | the inner part of something |
| wind | a strong current of air |
| skeleton | a structure used as a support |
