— I missed the beginning of ________ cartoon The Lion King.— What a pity! You should leave school half _______ hour earlier.
A:a, an
B:the, a
C:the, an
D:an, the
用托盘天平测物体质量前,调节横梁平衡时,发现指针在分度盘中线的左侧,这时应该( )