【C20】A．chargingB．expensiveC．cheapD．commercial

Attending continuing education classes ______.A．does not cost much moneyB．is expensiveC．re

A．enoughB．scarceC．cheapD．popular

【C2】A．smallB．bigC．cheapD．costly

Students in the 1970s considered liberal arts courses______.A．impracticalB．expensiveC．conc

We saw a lot of commercial buildings in Ch

We saw a lot of commercial buildings in Ch