Green plants breathe_____oxygen in sunlight.
A. in B. out C. back D. for
Green plants breathe_____oxygen in sunlight.
A. in B. out C. back D. for
B
考查介词用法。句意：在阳光下，绿色植物释放出氧气。此处释放的意思；breathe out意思“排出气体”，符合句意。