A:did; do; was seeing
B:did; do; saw
C:were; doing; saw
D:were; doing; am seeing
小小书法家(看拼音,写汉字)
píng
wēi
shéng
jī
huò
dǔ
____子
____险
____动
____得
____住
人体吸收的氧的最终去向是( )