语法

v it ADJ to-inf

The 'cheap' group

These adjectives indicate that an action is cheap or expensive. They are used with verbs such as make.
Then, just over 100 years ago, things began to change. Coal mines and railroads made it cheaper to burn coal than wood and agriculture really took off in the prairies of the Midwest.
  • cheap
  • expensive
  • profitable
  • uneconomic
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