【C2】A．capableB．suitableC．efficientD．fit

A．capableB．probableC．practicalD．possible

A．effectiveB．importantC．efficientD．special

My friend‘s reply was courteous but firm.A.well－informeB.respectfulC.efficientD.respectab

【C6】A．makeB．adjustC．adaptD．fit

【C6】A．closeB．acceptableC．openD．fit

【C2】A．suitablenessB．suitabilityC．fitD．fitness