. When she came several days later, she found that all things still _______ where she had _______ them.

A．lay; laid

B．laid; laid

C．lay; lain

D．lying; lain

不能证明微粒间有间隙的事实是（　　）

A．气球可以被压缩

B．50mL水和50mL酒精充分混合后，总体积小于100mL

C．糖块放入水中逐渐溶解，而溶液的体积几乎不变

D．面粉中掺和蔗糖