A：paid u
B：paid out
C：paid back
D：paid off
The magazines are _______ easy that the children can read them well.
葡萄糖与氧气在细胞内发生反应并释放能量的过程叫做（ ）
125×64=(125×____)×8
党的十八届三中全会决定，启动一方是独生子女的夫妇可生育两个孩子的政策，表明我国（ ）
