1.不缺动，句句连 2.齐缺副 3.Be 后名形分 the后数名形 4.名前形数物 5，缺主首选名和代，还有动名和to do 6，and,but表并列，介短固搭要看清
100
300
500
It costs…It ‘s the most expensive model in the shop.
It costs …This model is less expensive than that one.
Lesson 111
The most expensive model