题目

Progress______ so far very good and we are sure that the work will be finished on time. A. was       B. had been    C. has been    D. will be 答案：C 解析:考查了时态--现在完成时如图所示是我们常用的指甲刀，使用时通常把手放在    点；锉刀上刻有花纹是为了增大    ．