单选题 He ______ in a small workshop, but now he is president of a big business company.
A. used to working B. was used to work
C. used to work D. was used to working

【正确答案】 C

【答案解析】[解析] used to+动词原形表示过去常常而现已不复存在的动作或状态。be used to+名词/动名词表示“习惯于”。