Ⅰ.单项填空(共15小题；每小题1分，满分15分)
请认真阅读下面各题，从题中所给的A、B、C、D四个选项中，选出可以填入空白处的最佳选项。
1．(2015·南京师大附中二模)It is of great importance ________ parents say and do in family life, which may have a lifelong effect on their children.
A．what B．that C．how D．why
2．(2015·苏北四市联考)After the death of her mother, the girl was sold to a rich man just in the neighboring area, from ________ house she tried to escape twice.
A．whom B．his C．whose D．which
