美容美发场所化妆品、消毒产品储藏应遵循()原则,变质或过期产品应及时清除并销毁。
参考答案:先进先出
— Is Lily good at singing? —Yes , she is.We often hear her_______ in the next room.
A.sing
B.to sing
C.sang
D.Sings
--Mom, I can't find my new T-shirt.
--Oh, honey, it__________after you went to see AVATAR. It is still in the dryer.
A.has been washing
B.has washed
C.was to be washed
D.was washed