We should put away all medicines out of reach of children and make sure they are not left ________.
A. lie round B. laying around
C. lain round D. lying around
We should put away all medicines out of reach of children and make sure they are not left ________.
A. lie round B. laying around
C. lain round D. lying around
D
由句意判断用表示“位于”的不及物动词lie，用现在分词作主补。