题目

Can you make sure________ the gold ring? A. where Alice had put  B. where had Alice put C. where Alice has put  D. where has Alice put   答案：C宾语从句应用陈述语序，应用现在完成时。11．考试涂答题卡用的2B铅笔的“芯”，主要成分是石墨，石墨是导体（填“导体”或“绝缘体”），考试专用笔握笔处的黑色部分是橡胶制成的，它可以增大手和笔之间的摩擦力．