The question of __________ English will keep on changing in the future is easy __________ since it is certain that this process will continue.
A：if; to answer
B：whether; to be answered
C：whether; to answer
D：if; to be answered
下列数据不能确定物体位置的是（ ）
“凤阳地多不打粮，磙子一住就逃荒。只见凤阳女出嫁，不见新娘进凤阳”。“说凤阳、道凤阳，凤阳本是好地方。自从土地还家后，幸福生活万年长”。出现上述变化的原因是
