【C10】A．bestB．mostC．leastD．worst

【C17】A．mostB．moreC．leastD．less

【C10】A．at bestB．at largeC．at onceD．at heart

【C10】A．lessB．moreC．leastD．most

【C4】A．bestB．leastC．lengthD．first

【C6】A．muchB．mostC．a lotD．more

【C20】A．lessB．momC．leastD．most