【C15】A．costlyB．cheapC．valuableD．precious

A．realB．modernC．worthyD．valuable

A．flewB．droveC．worthyD．valuable

【C9】A．evaluableB．validC．availableD．valuable

【C9】A．costlyB．cheapC．smallD．noisy

【C4】A．deservingB．worthC．worthyD．valuable

【C7】A．expensiveB．cheapC．valuableD．reasonable