品句填词
1. As is known, metals expand (膨胀)with heat and contract(收缩) as they cool.
2. Why does it cost so much? I think it’s just an ordinary(普通的)camera.
3. In conclusion(结论), walking is a cheap, safe and enjoyable form of exercise.
4. The company has just brought in a piece of advanced equipment(设备), which will boost its business.
5. The conference marked an important stage(阶段) in the two countries’ relationship.
