— I left my handbag on the train, but luckily someone gave it to a railway official.

— How unbelievable to get it back! I mean, someone ________ it.   [ ]

A. will have stolen  

B. might have stolen

C. should have stolen  

D. must have stolen

与温度计测量范围无关的因素是（）。

A.工作液的沸点

B.毛细管长

C.工作液的凝固点

D.玻璃材料的性质